Provided by: pandoc_2.17.1.1-1ubuntu2_amd64 
NAME
pandoc - general markup converter
SYNOPSIS
pandoc [options] [input-file]...
DESCRIPTION
Pandoc is a Haskell library for converting from one markup format to another, and a
command-line tool that uses this library.
Pandoc can convert between numerous markup and word processing formats, including, but not
limited to, various flavors of Markdown, HTML, LaTeX and Word docx. For the full lists of
input and output formats, see the --from and --to options below. Pandoc can also produce
PDF output: see creating a PDF, below.
Pandoc’s enhanced version of Markdown includes syntax for tables, definition lists,
metadata blocks, footnotes, citations, math, and much more. See below under Pandoc’s
Markdown.
Pandoc has a modular design: it consists of a set of readers, which parse text in a given
format and produce a native representation of the document (an abstract syntax tree or
AST), and a set of writers, which convert this native representation into a target format.
Thus, adding an input or output format requires only adding a reader or writer. Users can
also run custom pandoc filters to modify the intermediate AST.
Because pandoc’s intermediate representation of a document is less expressive than many of
the formats it converts between, one should not expect perfect conversions between every
format and every other. Pandoc attempts to preserve the structural elements of a
document, but not formatting details such as margin size. And some document elements,
such as complex tables, may not fit into pandoc’s simple document model. While
conversions from pandoc’s Markdown to all formats aspire to be perfect, conversions from
formats more expressive than pandoc’s Markdown can be expected to be lossy.
Using pandoc
If no input-files are specified, input is read from stdin. Output goes to stdout by
default. For output to a file, use the -o option:
pandoc -o output.html input.txt
By default, pandoc produces a document fragment. To produce a standalone document (e.g. a
valid HTML file including <head> and <body>), use the -s or --standalone flag:
pandoc -s -o output.html input.txt
For more information on how standalone documents are produced, see Templates below.
If multiple input files are given, pandoc will concatenate them all (with blank lines
between them) before parsing. (Use --file-scope to parse files individually.)
Specifying formats
The format of the input and output can be specified explicitly using command-line options.
The input format can be specified using the -f/--from option, the output format using the
-t/--to option. Thus, to convert hello.txt from Markdown to LaTeX, you could type:
pandoc -f markdown -t latex hello.txt
To convert hello.html from HTML to Markdown:
pandoc -f html -t markdown hello.html
Supported input and output formats are listed below under Options (see -f for input
formats and -t for output formats). You can also use pandoc --list-input-formats and
pandoc --list-output-formats to print lists of supported formats.
If the input or output format is not specified explicitly, pandoc will attempt to guess it
from the extensions of the filenames. Thus, for example,
pandoc -o hello.tex hello.txt
will convert hello.txt from Markdown to LaTeX. If no output file is specified (so that
output goes to stdout), or if the output file’s extension is unknown, the output format
will default to HTML. If no input file is specified (so that input comes from stdin), or
if the input files’ extensions are unknown, the input format will be assumed to be
Markdown.
Character encoding
Pandoc uses the UTF-8 character encoding for both input and output. If your local
character encoding is not UTF-8, you should pipe input and output through iconv:
iconv -t utf-8 input.txt | pandoc | iconv -f utf-8
Note that in some output formats (such as HTML, LaTeX, ConTeXt, RTF, OPML, DocBook, and
Texinfo), information about the character encoding is included in the document header,
which will only be included if you use the -s/--standalone option.
Creating a PDF
To produce a PDF, specify an output file with a .pdf extension:
pandoc test.txt -o test.pdf
By default, pandoc will use LaTeX to create the PDF, which requires that a LaTeX engine be
installed (see --pdf-engine below). Alternatively, pandoc can use ConTeXt, roff ms, or
HTML as an intermediate format. To do this, specify an output file with a .pdf extension,
as before, but add the --pdf-engine option or -t context, -t html, or -t ms to the command
line. The tool used to generate the PDF from the intermediate format may be specified
using --pdf-engine.
You can control the PDF style using variables, depending on the intermediate format used:
see variables for LaTeX, variables for ConTeXt, variables for wkhtmltopdf, variables for
ms. When HTML is used as an intermediate format, the output can be styled using --css.
To debug the PDF creation, it can be useful to look at the intermediate representation:
instead of -o test.pdf, use for example -s -o test.tex to output the generated LaTeX. You
can then test it with pdflatex test.tex.
When using LaTeX, the following packages need to be available (they are included with all
recent versions of TeX Live): amsfonts, amsmath, lm, unicode-math, iftex, listings (if the
--listings option is used), fancyvrb, longtable, booktabs, graphicx (if the document
contains images), hyperref, xcolor, ulem, geometry (with the geometry variable set),
setspace (with linestretch), and babel (with lang). If CJKmainfont is set, xeCJK is
needed. The use of xelatex or lualatex as the PDF engine requires fontspec. lualatex
uses selnolig. xelatex uses bidi (with the dir variable set). If the mathspec variable
is set, xelatex will use mathspec instead of unicode-math. The upquote and microtype
packages are used if available, and csquotes will be used for typography if the csquotes
variable or metadata field is set to a true value. The natbib, biblatex, bibtex, and
biber packages can optionally be used for citation rendering. The following packages will
be used to improve output quality if present, but pandoc does not require them to be
present: upquote (for straight quotes in verbatim environments), microtype (for better
spacing adjustments), parskip (for better inter-paragraph spaces), xurl (for better line
breaks in URLs), bookmark (for better PDF bookmarks), and footnotehyper or footnote (to
allow footnotes in tables).
Reading from the Web
Instead of an input file, an absolute URI may be given. In this case pandoc will fetch
the content using HTTP:
pandoc -f html -t markdown https://www.fsf.org
It is possible to supply a custom User-Agent string or other header when requesting a
document from a URL:
pandoc -f html -t markdown --request-header User-Agent:"Mozilla/5.0" \
https://www.fsf.org
OPTIONS
General options
-f FORMAT, -r FORMAT, --from=FORMAT, --read=FORMAT
Specify input format. FORMAT can be:
• bibtex (BibTeX bibliography)
• biblatex (BibLaTeX bibliography)
• commonmark (CommonMark Markdown)
• commonmark_x (CommonMark Markdown with extensions)
• creole (Creole 1.0)
• csljson (CSL JSON bibliography)
• csv (CSV table)
• docbook (DocBook)
• docx (Word docx)
• dokuwiki (DokuWiki markup)
• epub (EPUB)
• fb2 (FictionBook2 e-book)
• gfm (GitHub-Flavored Markdown), or the deprecated and less accurate
markdown_github; use markdown_github only if you need extensions not supported in
gfm.
• haddock (Haddock markup)
• html (HTML)
• ipynb (Jupyter notebook)
• jats (JATS XML)
• jira (Jira/Confluence wiki markup)
• json (JSON version of native AST)
• latex (LaTeX)
• markdown (Pandoc’s Markdown)
• markdown_mmd (MultiMarkdown)
• markdown_phpextra (PHP Markdown Extra)
• markdown_strict (original unextended Markdown)
• mediawiki (MediaWiki markup)
• man (roff man)
• muse (Muse)
• native (native Haskell)
• odt (ODT)
• opml (OPML)
• org (Emacs Org mode)
• rtf (Rich Text Format)
• rst (reStructuredText)
• t2t (txt2tags)
• textile (Textile)
• tikiwiki (TikiWiki markup)
• twiki (TWiki markup)
• vimwiki (Vimwiki)
• the path of a custom Lua reader, see Custom readers and writers below
Extensions can be individually enabled or disabled by appending +EXTENSION or
-EXTENSION to the format name. See Extensions below, for a list of extensions and
their names. See --list-input-formats and --list-extensions, below.
-t FORMAT, -w FORMAT, --to=FORMAT, --write=FORMAT
Specify output format. FORMAT can be:
• asciidoc (AsciiDoc) or asciidoctor (AsciiDoctor)
• beamer (LaTeX beamer slide show)
• bibtex (BibTeX bibliography)
• biblatex (BibLaTeX bibliography)
• commonmark (CommonMark Markdown)
• commonmark_x (CommonMark Markdown with extensions)
• context (ConTeXt)
• csljson (CSL JSON bibliography)
• docbook or docbook4 (DocBook 4)
• docbook5 (DocBook 5)
• docx (Word docx)
• dokuwiki (DokuWiki markup)
• epub or epub3 (EPUB v3 book)
• epub2 (EPUB v2)
• fb2 (FictionBook2 e-book)
• gfm (GitHub-Flavored Markdown), or the deprecated and less accurate
markdown_github; use markdown_github only if you need extensions not supported in
gfm.
• haddock (Haddock markup)
• html or html5 (HTML, i.e. HTML5/XHTML polyglot markup)
• html4 (XHTML 1.0 Transitional)
• icml (InDesign ICML)
• ipynb (Jupyter notebook)
• jats_archiving (JATS XML, Archiving and Interchange Tag Set)
• jats_articleauthoring (JATS XML, Article Authoring Tag Set)
• jats_publishing (JATS XML, Journal Publishing Tag Set)
• jats (alias for jats_archiving)
• jira (Jira/Confluence wiki markup)
• json (JSON version of native AST)
• latex (LaTeX)
• man (roff man)
• markdown (Pandoc’s Markdown)
• markdown_mmd (MultiMarkdown)
• markdown_phpextra (PHP Markdown Extra)
• markdown_strict (original unextended Markdown)
• markua (Markua)
• mediawiki (MediaWiki markup)
• ms (roff ms)
• muse (Muse),
• native (native Haskell),
• odt (OpenOffice text document)
• opml (OPML)
• opendocument (OpenDocument)
• org (Emacs Org mode)
• pdf (PDF)
• plain (plain text),
• pptx (PowerPoint slide show)
• rst (reStructuredText)
• rtf (Rich Text Format)
• texinfo (GNU Texinfo)
• textile (Textile)
• slideous (Slideous HTML and JavaScript slide show)
• slidy (Slidy HTML and JavaScript slide show)
• dzslides (DZSlides HTML5 + JavaScript slide show),
• revealjs (reveal.js HTML5 + JavaScript slide show)
• s5 (S5 HTML and JavaScript slide show)
• tei (TEI Simple)
• xwiki (XWiki markup)
• zimwiki (ZimWiki markup)
• the path of a custom Lua writer, see Custom readers and writers below
Note that odt, docx, epub, and pdf output will not be directed to stdout unless
forced with -o -.
Extensions can be individually enabled or disabled by appending +EXTENSION or
-EXTENSION to the format name. See Extensions below, for a list of extensions and
their names. See --list-output-formats and --list-extensions, below.
-o FILE, --output=FILE
Write output to FILE instead of stdout. If FILE is -, output will go to stdout,
even if a non-textual format (docx, odt, epub2, epub3) is specified.
--data-dir=DIRECTORY
Specify the user data directory to search for pandoc data files. If this option is
not specified, the default user data directory will be used. On *nix and macOS
systems this will be the pandoc subdirectory of the XDG data directory (by default,
$HOME/.local/share, overridable by setting the XDG_DATA_HOME environment variable).
If that directory does not exist and $HOME/.pandoc exists, it will be used (for
backwards compatibility). On Windows the default user data directory is
C:\Users\USERNAME\AppData\Roaming\pandoc. You can find the default user data
directory on your system by looking at the output of pandoc --version. Data files
placed in this directory (for example, reference.odt, reference.docx, epub.css,
templates) will override pandoc’s normal defaults.
-d FILE, --defaults=FILE
Specify a set of default option settings. FILE is a YAML file whose fields
correspond to command-line option settings. All options for document conversion,
including input and output files, can be set using a defaults file. The file will
be searched for first in the working directory, and then in the defaults
subdirectory of the user data directory (see --data-dir). The .yaml extension may
be omitted. See the section Defaults files for more information on the file
format. Settings from the defaults file may be overridden or extended by
subsequent options on the command line.
--bash-completion
Generate a bash completion script. To enable bash completion with pandoc, add this
to your .bashrc:
eval "$(pandoc --bash-completion)"
--verbose
Give verbose debugging output.
--quiet
Suppress warning messages.
--fail-if-warnings
Exit with error status if there are any warnings.
--log=FILE
Write log messages in machine-readable JSON format to FILE. All messages above
DEBUG level will be written, regardless of verbosity settings (--verbose, --quiet).
--list-input-formats
List supported input formats, one per line.
--list-output-formats
List supported output formats, one per line.
--list-extensions[=FORMAT]
List supported extensions for FORMAT, one per line, preceded by a + or - indicating
whether it is enabled by default in FORMAT. If FORMAT is not specified, defaults
for pandoc’s Markdown are given.
--list-highlight-languages
List supported languages for syntax highlighting, one per line.
--list-highlight-styles
List supported styles for syntax highlighting, one per line. See --highlight-
style.
-v, --version
Print version.
-h, --help
Show usage message.
Reader options
--shift-heading-level-by=NUMBER
Shift heading levels by a positive or negative integer. For example, with --shift-
heading-level-by=-1, level 2 headings become level 1 headings, and level 3 headings
become level 2 headings. Headings cannot have a level less than 1, so a heading
that would be shifted below level 1 becomes a regular paragraph. Exception: with a
shift of -N, a level-N heading at the beginning of the document replaces the
metadata title. --shift-heading-level-by=-1 is a good choice when converting HTML
or Markdown documents that use an initial level-1 heading for the document title
and level-2+ headings for sections. --shift-heading-level-by=1 may be a good
choice for converting Markdown documents that use level-1 headings for sections to
HTML, since pandoc uses a level-1 heading to render the document title.
--base-header-level=NUMBER
Deprecated. Use --shift-heading-level-by=X instead, where X = NUMBER - 1. Specify
the base level for headings (defaults to 1).
--strip-empty-paragraphs
Deprecated. Use the +empty_paragraphs extension instead. Ignore paragraphs with no
content. This option is useful for converting word processing documents where
users have used empty paragraphs to create inter-paragraph space.
--indented-code-classes=CLASSES
Specify classes to use for indented code blocks–for example, perl,numberLines or
haskell. Multiple classes may be separated by spaces or commas.
--default-image-extension=EXTENSION
Specify a default extension to use when image paths/URLs have no extension. This
allows you to use the same source for formats that require different kinds of
images. Currently this option only affects the Markdown and LaTeX readers.
--file-scope
Parse each file individually before combining for multifile documents. This will
allow footnotes in different files with the same identifiers to work as expected.
If this option is set, footnotes and links will not work across files. Reading
binary files (docx, odt, epub) implies --file-scope.
-F PROGRAM, --filter=PROGRAM
Specify an executable to be used as a filter transforming the pandoc AST after the
input is parsed and before the output is written. The executable should read JSON
from stdin and write JSON to stdout. The JSON must be formatted like pandoc’s own
JSON input and output. The name of the output format will be passed to the filter
as the first argument. Hence,
pandoc --filter ./caps.py -t latex
is equivalent to
pandoc -t json | ./caps.py latex | pandoc -f json -t latex
The latter form may be useful for debugging filters.
Filters may be written in any language. Text.Pandoc.JSON exports toJSONFilter to
facilitate writing filters in Haskell. Those who would prefer to write filters in
python can use the module pandocfilters, installable from PyPI. There are also
pandoc filter libraries in PHP, perl, and JavaScript/node.js.
In order of preference, pandoc will look for filters in
1. a specified full or relative path (executable or non-executable)
2. $DATADIR/filters (executable or non-executable) where $DATADIR is the user data
directory (see --data-dir, above).
3. $PATH (executable only)
Filters, Lua-filters, and citeproc processing are applied in the order specified on
the command line.
-L SCRIPT, --lua-filter=SCRIPT
Transform the document in a similar fashion as JSON filters (see --filter), but use
pandoc’s built-in Lua filtering system. The given Lua script is expected to return
a list of Lua filters which will be applied in order. Each Lua filter must contain
element-transforming functions indexed by the name of the AST element on which the
filter function should be applied.
The pandoc Lua module provides helper functions for element creation. It is always
loaded into the script’s Lua environment.
See the Lua filters documentation for further details.
In order of preference, pandoc will look for Lua filters in
1. a specified full or relative path
2. $DATADIR/filters where $DATADIR is the user data directory (see --data-dir,
above).
Filters, Lua filters, and citeproc processing are applied in the order specified on
the command line.
-M KEY[=VAL], --metadata=KEY[:VAL]
Set the metadata field KEY to the value VAL. A value specified on the command line
overrides a value specified in the document using YAML metadata blocks. Values
will be parsed as YAML boolean or string values. If no value is specified, the
value will be treated as Boolean true. Like --variable, --metadata causes template
variables to be set. But unlike --variable, --metadata affects the metadata of the
underlying document (which is accessible from filters and may be printed in some
output formats) and metadata values will be escaped when inserted into the
template.
--metadata-file=FILE
Read metadata from the supplied YAML (or JSON) file. This option can be used with
every input format, but string scalars in the YAML file will always be parsed as
Markdown. Generally, the input will be handled the same as in YAML metadata
blocks. This option can be used repeatedly to include multiple metadata files;
values in files specified later on the command line will be preferred over those
specified in earlier files. Metadata values specified inside the document, or by
using -M, overwrite values specified with this option. The file will be searched
for first in the working directory, and then in the metadata subdirectory of the
user data directory (see --data-dir).
-p, --preserve-tabs
Preserve tabs instead of converting them to spaces. (By default, pandoc converts
tabs to spaces before parsing its input.) Note that this will only affect tabs in
literal code spans and code blocks. Tabs in regular text are always treated as
spaces.
--tab-stop=NUMBER
Specify the number of spaces per tab (default is 4).
--track-changes=accept|reject|all
Specifies what to do with insertions, deletions, and comments produced by the MS
Word “Track Changes” feature. accept (the default) processes all the insertions
and deletions. reject ignores them. Both accept and reject ignore comments. all
includes all insertions, deletions, and comments, wrapped in spans with insertion,
deletion, comment-start, and comment-end classes, respectively. The author and
time of change is included. all is useful for scripting: only accepting changes
from a certain reviewer, say, or before a certain date. If a paragraph is inserted
or deleted, track-changes=all produces a span with the class paragraph-
insertion/paragraph-deletion before the affected paragraph break. This option only
affects the docx reader.
--extract-media=DIR
Extract images and other media contained in or linked from the source document to
the path DIR, creating it if necessary, and adjust the images references in the
document so they point to the extracted files. Media are downloaded, read from the
file system, or extracted from a binary container (e.g. docx), as needed. The
original file paths are used if they are relative paths not containing ...
Otherwise filenames are constructed from the SHA1 hash of the contents.
--abbreviations=FILE
Specifies a custom abbreviations file, with abbreviations one to a line. If this
option is not specified, pandoc will read the data file abbreviations from the user
data directory or fall back on a system default. To see the system default, use
pandoc --print-default-data-file=abbreviations. The only use pandoc makes of this
list is in the Markdown reader. Strings found in this list will be followed by a
nonbreaking space, and the period will not produce sentence-ending space in formats
like LaTeX. The strings may not contain spaces.
--trace
Print diagnostic output tracing parser progress to stderr. This option is intended
for use by developers in diagnosing performance issues.
General writer options
-s, --standalone
Produce output with an appropriate header and footer (e.g. a standalone HTML,
LaTeX, TEI, or RTF file, not a fragment). This option is set automatically for
pdf, epub, epub3, fb2, docx, and odt output. For native output, this option causes
metadata to be included; otherwise, metadata is suppressed.
--template=FILE|URL
Use the specified file as a custom template for the generated document. Implies
--standalone. See Templates, below, for a description of template syntax. If no
extension is specified, an extension corresponding to the writer will be added, so
that --template=special looks for special.html for HTML output. If the template is
not found, pandoc will search for it in the templates subdirectory of the user data
directory (see --data-dir). If this option is not used, a default template
appropriate for the output format will be used (see -D/--print-default-template).
-V KEY[=VAL], --variable=KEY[:VAL]
Set the template variable KEY to the value VAL when rendering the document in
standalone mode. If no VAL is specified, the key will be given the value true.
--sandbox
Run pandoc in a sandbox, limiting IO operations in readers and writers to reading
the files specified on the command line. Note that this option does not limit IO
operations by filters or in the production of PDF documents. But it does offer
security against, for example, disclosure of files through the use of include
directives. Anyone using pandoc on untrusted user input should use this option.
-D FORMAT, --print-default-template=FORMAT
Print the system default template for an output FORMAT. (See -t for a list of
possible FORMATs.) Templates in the user data directory are ignored. This option
may be used with -o/--output to redirect output to a file, but -o/--output must
come before --print-default-template on the command line.
Note that some of the default templates use partials, for example styles.html. To
print the partials, use --print-default-data-file: for example, --print-default-
data-file=templates/styles.html.
--print-default-data-file=FILE
Print a system default data file. Files in the user data directory are ignored.
This option may be used with -o/--output to redirect output to a file, but
-o/--output must come before --print-default-data-file on the command line.
--eol=crlf|lf|native
Manually specify line endings: crlf (Windows), lf (macOS/Linux/UNIX), or native
(line endings appropriate to the OS on which pandoc is being run). The default is
native.
--dpi=NUMBER
Specify the default dpi (dots per inch) value for conversion from pixels to
inch/centimeters and vice versa. (Technically, the correct term would be ppi:
pixels per inch.) The default is 96dpi. When images contain information about dpi
internally, the encoded value is used instead of the default specified by this
option.
--wrap=auto|none|preserve
Determine how text is wrapped in the output (the source code, not the rendered
version). With auto (the default), pandoc will attempt to wrap lines to the column
width specified by --columns (default 72). With none, pandoc will not wrap lines
at all. With preserve, pandoc will attempt to preserve the wrapping from the
source document (that is, where there are nonsemantic newlines in the source, there
will be nonsemantic newlines in the output as well). In ipynb output, this option
affects wrapping of the contents of markdown cells.
--columns=NUMBER
Specify length of lines in characters. This affects text wrapping in the generated
source code (see --wrap). It also affects calculation of column widths for plain
text tables (see Tables below).
--toc, --table-of-contents
Include an automatically generated table of contents (or, in the case of latex,
context, docx, odt, opendocument, rst, or ms, an instruction to create one) in the
output document. This option has no effect unless -s/--standalone is used, and it
has no effect on man, docbook4, docbook5, or jats output.
Note that if you are producing a PDF via ms, the table of contents will appear at
the beginning of the document, before the title. If you would prefer it to be at
the end of the document, use the option --pdf-engine-opt=--no-toc-relocation.
--toc-depth=NUMBER
Specify the number of section levels to include in the table of contents. The
default is 3 (which means that level-1, 2, and 3 headings will be listed in the
contents).
--strip-comments
Strip out HTML comments in the Markdown or Textile source, rather than passing them
on to Markdown, Textile or HTML output as raw HTML. This does not apply to HTML
comments inside raw HTML blocks when the markdown_in_html_blocks extension is not
set.
--no-highlight
Disables syntax highlighting for code blocks and inlines, even when a language
attribute is given.
--highlight-style=STYLE|FILE
Specifies the coloring style to be used in highlighted source code. Options are
pygments (the default), kate, monochrome, breezeDark, espresso, zenburn, haddock,
and tango. For more information on syntax highlighting in pandoc, see Syntax
highlighting, below. See also --list-highlight-styles.
Instead of a STYLE name, a JSON file with extension .theme may be supplied. This
will be parsed as a KDE syntax highlighting theme and (if valid) used as the
highlighting style.
To generate the JSON version of an existing style, use --print-highlight-style.
--print-highlight-style=STYLE|FILE
Prints a JSON version of a highlighting style, which can be modified, saved with a
.theme extension, and used with --highlight-style. This option may be used with
-o/--output to redirect output to a file, but -o/--output must come before --print-
highlight-style on the command line.
--syntax-definition=FILE
Instructs pandoc to load a KDE XML syntax definition file, which will be used for
syntax highlighting of appropriately marked code blocks. This can be used to add
support for new languages or to use altered syntax definitions for existing
languages. This option may be repeated to add multiple syntax definitions.
-H FILE, --include-in-header=FILE|URL
Include contents of FILE, verbatim, at the end of the header. This can be used,
for example, to include special CSS or JavaScript in HTML documents. This option
can be used repeatedly to include multiple files in the header. They will be
included in the order specified. Implies --standalone.
-B FILE, --include-before-body=FILE|URL
Include contents of FILE, verbatim, at the beginning of the document body
(e.g. after the <body> tag in HTML, or the \begin{document} command in LaTeX).
This can be used to include navigation bars or banners in HTML documents. This
option can be used repeatedly to include multiple files. They will be included in
the order specified. Implies --standalone.
-A FILE, --include-after-body=FILE|URL
Include contents of FILE, verbatim, at the end of the document body (before the
</body> tag in HTML, or the \end{document} command in LaTeX). This option can be
used repeatedly to include multiple files. They will be included in the order
specified. Implies --standalone.
--resource-path=SEARCHPATH
List of paths to search for images and other resources. The paths should be
separated by : on Linux, UNIX, and macOS systems, and by ; on Windows. If
--resource-path is not specified, the default resource path is the working
directory. Note that, if --resource-path is specified, the working directory must
be explicitly listed or it will not be searched. For example: --resource-
path=.:test will search the working directory and the test subdirectory, in that
order. This option can be used repeatedly. Search path components that come later
on the command line will be searched before those that come earlier, so --resource-
path foo:bar --resource-path baz:bim is equivalent to --resource-path
baz:bim:foo:bar.
--request-header=NAME:VAL
Set the request header NAME to the value VAL when making HTTP requests (for
example, when a URL is given on the command line, or when resources used in a
document must be downloaded). If you’re behind a proxy, you also need to set the
environment variable http_proxy to http://....
--no-check-certificate
Disable the certificate verification to allow access to unsecure HTTP resources
(for example when the certificate is no longer valid or self signed).
Options affecting specific writers
--self-contained
Produce a standalone HTML file with no external dependencies, using data: URIs to
incorporate the contents of linked scripts, stylesheets, images, and videos.
Implies --standalone. The resulting file should be “self-contained,” in the sense
that it needs no external files and no net access to be displayed properly by a
browser. This option works only with HTML output formats, including html4, html5,
html+lhs, html5+lhs, s5, slidy, slideous, dzslides, and revealjs. Scripts, images,
and stylesheets at absolute URLs will be downloaded; those at relative URLs will be
sought relative to the working directory (if the first source file is local) or
relative to the base URL (if the first source file is remote). Elements with the
attribute data-external="1" will be left alone; the documents they link to will not
be incorporated in the document. Limitation: resources that are loaded dynamically
through JavaScript cannot be incorporated; as a result, --self-contained does not
work with --mathjax, and some advanced features (e.g. zoom or speaker notes) may
not work in an offline “self-contained” reveal.js slide show.
--html-q-tags
Use <q> tags for quotes in HTML. (This option only has an effect if the smart
extension is enabled for the input format used.)
--ascii
Use only ASCII characters in output. Currently supported for XML and HTML formats
(which use entities instead of UTF-8 when this option is selected), CommonMark,
gfm, and Markdown (which use entities), roff ms (which use hexadecimal escapes),
and to a limited degree LaTeX (which uses standard commands for accented characters
when possible). roff man output uses ASCII by default.
--reference-links
Use reference-style links, rather than inline links, in writing Markdown or
reStructuredText. By default inline links are used. The placement of link
references is affected by the --reference-location option.
--reference-location=block|section|document
Specify whether footnotes (and references, if reference-links is set) are placed at
the end of the current (top-level) block, the current section, or the document.
The default is document. Currently this option only affects the markdown, muse,
html, epub, slidy, s5, slideous, dzslides, and revealjs writers.
--markdown-headings=setext|atx
Specify whether to use ATX-style (#-prefixed) or Setext-style (underlined) headings
for level 1 and 2 headings in Markdown output. (The default is atx.) ATX-style
headings are always used for levels 3+. This option also affects Markdown cells in
ipynb output.
--atx-headers
Deprecated synonym for --markdown-headings=atx.
--top-level-division=default|section|chapter|part
Treat top-level headings as the given division type in LaTeX, ConTeXt, DocBook, and
TEI output. The hierarchy order is part, chapter, then section; all headings are
shifted such that the top-level heading becomes the specified type. The default
behavior is to determine the best division type via heuristics: unless other
conditions apply, section is chosen. When the documentclass variable is set to
report, book, or memoir (unless the article option is specified), chapter is
implied as the setting for this option. If beamer is the output format, specifying
either chapter or part will cause top-level headings to become \part{..}, while
second-level headings remain as their default type.
-N, --number-sections
Number section headings in LaTeX, ConTeXt, HTML, Docx, ms, or EPUB output. By
default, sections are not numbered. Sections with class unnumbered will never be
numbered, even if --number-sections is specified.
--number-offset=NUMBER[,NUMBER,...]
Offset for section headings in HTML output (ignored in other output formats). The
first number is added to the section number for top-level headings, the second for
second-level headings, and so on. So, for example, if you want the first top-level
heading in your document to be numbered “6”, specify --number-offset=5. If your
document starts with a level-2 heading which you want to be numbered “1.5”, specify
--number-offset=1,4. Offsets are 0 by default. Implies --number-sections.
--listings
Use the listings package for LaTeX code blocks. The package does not support
multi-byte encoding for source code. To handle UTF-8 you would need to use a
custom template. This issue is fully documented here: Encoding issue with the
listings package.
-i, --incremental
Make list items in slide shows display incrementally (one by one). The default is
for lists to be displayed all at once.
--slide-level=NUMBER
Specifies that headings with the specified level create slides (for beamer, s5,
slidy, slideous, dzslides). Headings above this level in the hierarchy are used to
divide the slide show into sections; headings below this level create subheads
within a slide. Valid values are 0-6. If a slide level of 0 is specified, slides
will not be split automatically on headings, and horizontal rules must be used to
indicate slide boundaries. If a slide level is not specified explicitly, the slide
level will be set automatically based on the contents of the document; see
Structuring the slide show.
--section-divs
Wrap sections in <section> tags (or <div> tags for html4), and attach identifiers
to the enclosing <section> (or <div>) rather than the heading itself. See Heading
identifiers, below.
--email-obfuscation=none|javascript|references
Specify a method for obfuscating mailto: links in HTML documents. none leaves
mailto: links as they are. javascript obfuscates them using JavaScript.
references obfuscates them by printing their letters as decimal or hexadecimal
character references. The default is none.
--id-prefix=STRING
Specify a prefix to be added to all identifiers and internal links in HTML and
DocBook output, and to footnote numbers in Markdown and Haddock output. This is
useful for preventing duplicate identifiers when generating fragments to be
included in other pages.
-T STRING, --title-prefix=STRING
Specify STRING as a prefix at the beginning of the title that appears in the HTML
header (but not in the title as it appears at the beginning of the HTML body).
Implies --standalone.
-c URL, --css=URL
Link to a CSS style sheet. This option can be used repeatedly to include multiple
files. They will be included in the order specified.
A stylesheet is required for generating EPUB. If none is provided using this
option (or the css or stylesheet metadata fields), pandoc will look for a file
epub.css in the user data directory (see --data-dir). If it is not found there,
sensible defaults will be used.
--reference-doc=FILE
Use the specified file as a style reference in producing a docx or ODT file.
Docx For best results, the reference docx should be a modified version of a docx
file produced using pandoc. The contents of the reference docx are ignored,
but its stylesheets and document properties (including margins, page size,
header, and footer) are used in the new docx. If no reference docx is
specified on the command line, pandoc will look for a file reference.docx in
the user data directory (see --data-dir). If this is not found either,
sensible defaults will be used.
To produce a custom reference.docx, first get a copy of the default
reference.docx: pandoc -o custom-reference.docx --print-default-data-file
reference.docx. Then open custom-reference.docx in Word, modify the styles
as you wish, and save the file. For best results, do not make changes to
this file other than modifying the styles used by pandoc:
Paragraph styles:
• Normal
• Body Text
• First Paragraph
• Compact
• Title
• Subtitle
• Author
• Date
• Abstract
• Bibliography
• Heading 1
• Heading 2
• Heading 3
• Heading 4
• Heading 5
• Heading 6
• Heading 7
• Heading 8
• Heading 9
• Block Text
• Footnote Text
• Definition Term
• Definition
• Caption
• Table Caption
• Image Caption
• Figure
• Captioned Figure
• TOC Heading
Character styles:
• Default Paragraph Font
• Body Text Char
• Verbatim Char
• Footnote Reference
• Hyperlink
• Section Number
Table style:
• Table
ODT For best results, the reference ODT should be a modified version of an ODT
produced using pandoc. The contents of the reference ODT are ignored, but
its stylesheets are used in the new ODT. If no reference ODT is specified
on the command line, pandoc will look for a file reference.odt in the user
data directory (see --data-dir). If this is not found either, sensible
defaults will be used.
To produce a custom reference.odt, first get a copy of the default
reference.odt: pandoc -o custom-reference.odt --print-default-data-file
reference.odt. Then open custom-reference.odt in LibreOffice, modify the
styles as you wish, and save the file.
PowerPoint
Templates included with Microsoft PowerPoint 2013 (either with .pptx or
.potx extension) are known to work, as are most templates derived from
these.
The specific requirement is that the template should contain layouts with
the following names (as seen within PowerPoint):
• Title Slide
• Title and Content
• Section Header
• Two Content
• Comparison
• Content with Caption
• Blank
For each name, the first layout found with that name will be used. If no
layout is found with one of the names, pandoc will output a warning and use
the layout with that name from the default reference doc instead. (How
these layouts are used is described in PowerPoint layout choice.)
All templates included with a recent version of MS PowerPoint will fit these
criteria. (You can click on Layout under the Home menu to check.)
You can also modify the default reference.pptx: first run pandoc -o custom-
reference.pptx --print-default-data-file reference.pptx, and then modify
custom-reference.pptx in MS PowerPoint (pandoc will use the layouts with the
names listed above).
--epub-cover-image=FILE
Use the specified image as the EPUB cover. It is recommended that the image be
less than 1000px in width and height. Note that in a Markdown source document you
can also specify cover-image in a YAML metadata block (see EPUB Metadata, below).
--epub-metadata=FILE
Look in the specified XML file for metadata for the EPUB. The file should contain
a series of Dublin Core elements. For example:
<dc:rights>Creative Commons</dc:rights>
<dc:language>es-AR</dc:language>
By default, pandoc will include the following metadata elements: <dc:title> (from
the document title), <dc:creator> (from the document authors), <dc:date> (from the
document date, which should be in ISO 8601 format), <dc:language> (from the lang
variable, or, if is not set, the locale), and <dc:identifier id="BookId"> (a
randomly generated UUID). Any of these may be overridden by elements in the
metadata file.
Note: if the source document is Markdown, a YAML metadata block in the document can
be used instead. See below under EPUB Metadata.
--epub-embed-font=FILE
Embed the specified font in the EPUB. This option can be repeated to embed
multiple fonts. Wildcards can also be used: for example, DejaVuSans-*.ttf.
However, if you use wildcards on the command line, be sure to escape them or put
the whole filename in single quotes, to prevent them from being interpreted by the
shell. To use the embedded fonts, you will need to add declarations like the
following to your CSS (see --css):
@font-face {
font-family: DejaVuSans;
font-style: normal;
font-weight: normal;
src:url("DejaVuSans-Regular.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: normal;
font-weight: bold;
src:url("DejaVuSans-Bold.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: italic;
font-weight: normal;
src:url("DejaVuSans-Oblique.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: italic;
font-weight: bold;
src:url("DejaVuSans-BoldOblique.ttf");
}
body { font-family: "DejaVuSans"; }
--epub-chapter-level=NUMBER
Specify the heading level at which to split the EPUB into separate “chapter” files.
The default is to split into chapters at level-1 headings. This option only
affects the internal composition of the EPUB, not the way chapters and sections are
displayed to users. Some readers may be slow if the chapter files are too large,
so for large documents with few level-1 headings, one might want to use a chapter
level of 2 or 3.
--epub-subdirectory=DIRNAME
Specify the subdirectory in the OCF container that is to hold the EPUB-specific
contents. The default is EPUB. To put the EPUB contents in the top level, use an
empty string.
--ipynb-output=all|none|best
Determines how ipynb output cells are treated. all means that all of the data
formats included in the original are preserved. none means that the contents of
data cells are omitted. best causes pandoc to try to pick the richest data block
in each output cell that is compatible with the output format. The default is
best.
--pdf-engine=PROGRAM
Use the specified engine when producing PDF output. Valid values are pdflatex,
lualatex, xelatex, latexmk, tectonic, wkhtmltopdf, weasyprint, pagedjs-cli, prince,
context, and pdfroff. If the engine is not in your PATH, the full path of the
engine may be specified here. If this option is not specified, pandoc uses the
following defaults depending on the output format specified using -t/--to:
• -t latex or none: pdflatex (other options: xelatex, lualatex, tectonic, latexmk)
• -t context: context
• -t html: wkhtmltopdf (other options: prince, weasyprint, pagedjs-cli; see print-
css.rocks for a good introduction to PDF generation from HTML/CSS.)
• -t ms: pdfroff
--pdf-engine-opt=STRING
Use the given string as a command-line argument to the pdf-engine. For example, to
use a persistent directory foo for latexmk’s auxiliary files, use --pdf-engine-
opt=-outdir=foo. Note that no check for duplicate options is done.
Citation rendering
-C, --citeproc
Process the citations in the file, replacing them with rendered citations and
adding a bibliography. Citation processing will not take place unless
bibliographic data is supplied, either through an external file specified using the
--bibliography option or the bibliography field in metadata, or via a references
section in metadata containing a list of citations in CSL YAML format with Markdown
formatting. The style is controlled by a CSL stylesheet specified using the --csl
option or the csl field in metadata. (If no stylesheet is specified, the chicago-
author-date style will be used by default.) The citation processing transformation
may be applied before or after filters or Lua filters (see --filter, --lua-filter):
these transformations are applied in the order they appear on the command line.
For more information, see the section on Citations.
--bibliography=FILE
Set the bibliography field in the document’s metadata to FILE, overriding any value
set in the metadata. If you supply this argument multiple times, each FILE will be
added to bibliography. If FILE is a URL, it will be fetched via HTTP. If FILE is
not found relative to the working directory, it will be sought in the resource path
(see --resource-path).
--csl=FILE
Set the csl field in the document’s metadata to FILE, overriding any value set in
the metadata. (This is equivalent to --metadata csl=FILE.) If FILE is a URL, it
will be fetched via HTTP. If FILE is not found relative to the working directory,
it will be sought in the resource path (see --resource-path) and finally in the csl
subdirectory of the pandoc user data directory.
--citation-abbreviations=FILE
Set the citation-abbreviations field in the document’s metadata to FILE, overriding
any value set in the metadata. (This is equivalent to --metadata citation-
abbreviations=FILE.) If FILE is a URL, it will be fetched via HTTP. If FILE is
not found relative to the working directory, it will be sought in the resource path
(see --resource-path) and finally in the csl subdirectory of the pandoc user data
directory.
--natbib
Use natbib for citations in LaTeX output. This option is not for use with the
--citeproc option or with PDF output. It is intended for use in producing a LaTeX
file that can be processed with bibtex.
--biblatex
Use biblatex for citations in LaTeX output. This option is not for use with the
--citeproc option or with PDF output. It is intended for use in producing a LaTeX
file that can be processed with bibtex or biber.
Math rendering in HTML
The default is to render TeX math as far as possible using Unicode characters. Formulas
are put inside a span with class="math", so that they may be styled differently from the
surrounding text if needed. However, this gives acceptable results only for basic math,
usually you will want to use --mathjax or another of the following options.
--mathjax[=URL]
Use MathJax to display embedded TeX math in HTML output. TeX math will be put
between \(...\) (for inline math) or \[...\] (for display math) and wrapped in
<span> tags with class math. Then the MathJax JavaScript will render it. The URL
should point to the MathJax.js load script. If a URL is not provided, a link to
the Cloudflare CDN will be inserted.
--mathml
Convert TeX math to MathML (in epub3, docbook4, docbook5, jats, html4 and html5).
This is the default in odt output. Note that currently only Firefox and Safari
(and select e-book readers) natively support MathML.
--webtex[=URL]
Convert TeX formulas to <img> tags that link to an external script that converts
formulas to images. The formula will be URL-encoded and concatenated with the URL
provided. For SVG images you can for example use --webtex
https://latex.codecogs.com/svg.latex?. If no URL is specified, the CodeCogs URL
generating PNGs will be used (https://latex.codecogs.com/png.latex?). Note: the
--webtex option will affect Markdown output as well as HTML, which is useful if
you’re targeting a version of Markdown without native math support.
--katex[=URL]
Use KaTeX to display embedded TeX math in HTML output. The URL is the base URL for
the KaTeX library. That directory should contain a katex.min.js and a
katex.min.css file. If a URL is not provided, a link to the KaTeX CDN will be
inserted.
--gladtex
Enclose TeX math in <eq> tags in HTML output. The resulting HTML can then be
processed by GladTeX to produce SVG images of the typeset formulas and an HTML file
with these images embedded.
pandoc -s --gladtex input.md -o myfile.htex
gladtex -d image_dir myfile.htex
# produces myfile.html and images in image_dir
Options for wrapper scripts
--dump-args
Print information about command-line arguments to stdout, then exit. This option
is intended primarily for use in wrapper scripts. The first line of output
contains the name of the output file specified with the -o option, or - (for
stdout) if no output file was specified. The remaining lines contain the command-
line arguments, one per line, in the order they appear. These do not include
regular pandoc options and their arguments, but do include any options appearing
after a -- separator at the end of the line.
--ignore-args
Ignore command-line arguments (for use in wrapper scripts). Regular pandoc options
are not ignored. Thus, for example,
pandoc --ignore-args -o foo.html -s foo.txt -- -e latin1
is equivalent to
pandoc -o foo.html -s
EXIT CODES
If pandoc completes successfully, it will return exit code 0. Nonzero exit codes have the
following meanings:
Code Error
───────────────────────────────────────────
1 PandocIOError
3 PandocFailOnWarningError
4 PandocAppError
5 PandocTemplateError
6 PandocOptionError
21 PandocUnknownReaderError
22 PandocUnknownWriterError
23 PandocUnsupportedExtensionError
24 PandocCiteprocError
25 PandocBibliographyError
31 PandocEpubSubdirectoryError
43 PandocPDFError
44 PandocXMLError
47 PandocPDFProgramNotFoundError
61 PandocHttpError
62 PandocShouldNeverHappenError
63 PandocSomeError
64 PandocParseError
65 PandocParsecError
66 PandocMakePDFError
67 PandocSyntaxMapError
83 PandocFilterError
84 PandocLuaError
91 PandocMacroLoop
92 PandocUTF8DecodingError
93 PandocIpynbDecodingError
94 PandocUnsupportedCharsetError
97 PandocCouldNotFindDataFileError
98 PandocCouldNotFindMetadataFileError
99 PandocResourceNotFound
DEFAULTS FILES
The --defaults option may be used to specify a package of options, in the form of a YAML
file.
Fields that are omitted will just have their regular default values. So a defaults file
can be as simple as one line:
verbosity: INFO
In fields that expect a file path (or list of file paths), the following syntax may be
used to interpolate environment variables:
csl: ${HOME}/mycsldir/special.csl
${USERDATA} may also be used; this will always resolve to the user data directory that is
current when the defaults file is parsed, regardless of the setting of the environment
variable USERDATA.
${.} will resolve to the directory containing the defaults file itself. This allows you
to refer to resources contained in that directory:
epub-cover-image: ${.}/cover.jpg
epub-metadata: ${.}/meta.xml
resource-path:
- . # the working directory from which pandoc is run
- ${.}/images # the images subdirectory of the directory
# containing this defaults file
This environment variable interpolation syntax only works in fields that expect file
paths.
Defaults files can be placed in the defaults subdirectory of the user data directory and
used from any directory. For example, one could create a file specifying defaults for
writing letters, save it as letter.yaml in the defaults subdirectory of the user data
directory, and then invoke these defaults from any directory using pandoc --defaults
letter or pandoc -dletter.
When multiple defaults are used, their contents will be combined.
Note that, where command-line arguments may be repeated (--metadata-file, --css,
--include-in-header, --include-before-body, --include-after-body, --variable, --metadata,
--syntax-definition), the values specified on the command line will combine with values
specified in the defaults file, rather than replacing them.
The following tables show the mapping between the command line and defaults file entries.
command line defaults file
─────────────────────────────────────────────────────────────────────────
foo.md input-file: foo.md
foo.md bar.md input-files:
- foo.md
- bar.md
The value of input-files may be left empty to indicate input from stdin, and it can be an
empty sequence [] for no input.
General options
command line defaults file
─────────────────────────────────────────────────────────────────────────
--from markdown+emoji from: markdown+emoji
reader: markdown+emoji
--to markdown+hard_line_breaks to: markdown+hard_line_breaks
writer: markdown+hard_line_breaks
--output foo.pdf output-file: foo.pdf
--output - output-file:
--data-dir dir data-dir: dir
--defaults file defaults:
- file
--verbose verbosity: INFO
--quiet verbosity: ERROR
--fail-if-warnings fail-if-warnings: true
--sandbox sandbox: true
--log=FILE log-file: FILE
Options specified in a defaults file itself always have priority over those in another
file included with a defaults: entry.
verbosity can have the values ERROR, WARNING, or INFO.
Reader options
command line defaults file
─────────────────────────────────────────────────────────────────────────
--shift-heading-level-by -1 shift-heading-level-by: -1
--indented-code-classes python indented-code-classes:
- python
--default-image-extension ".jpg" default-image-extension: '.jpg'
--file-scope file-scope: true
--filter pandoc-citeproc \ filters:
--lua-filter count-words.lua \ - pandoc-citeproc
--filter special.lua - count-words.lua
- type: json
path: special.lua
--metadata key=value \ metadata:
--metadata key2 key: value
key2: true
--metadata-file meta.yaml metadata-files:
- meta.yaml
metadata-file: meta.yaml
--preserve-tabs preserve-tabs: true
--tab-stop 8 tab-stop: 8
--track-changes accept track-changes: accept
--extract-media dir extract-media: dir
--abbreviations abbrevs.txt abbreviations: abbrevs.txt
--trace trace: true
Metadata values specified in a defaults file are parsed as literal string text, not
Markdown.
Filters will be assumed to be Lua filters if they have the .lua extension, and JSON
filters otherwise. But the filter type can also be specified explicitly, as shown.
Filters are run in the order specified. To include the built-in citeproc filter, use
either citeproc or {type: citeproc}.
General writer options
command line defaults file
─────────────────────────────────────────────────────────────────────────
--standalone standalone: true
--template letter template: letter
--variable key=val \ variables:
--variable key2 key: val
key2: true
--eol nl eol: nl
--dpi 300 dpi: 300
--wrap 60 wrap: 60
--columns 72 columns: 72
--table-of-contents table-of-contents: true
--toc toc: true
--toc-depth 3 toc-depth: 3
--strip-comments strip-comments: true
--no-highlight highlight-style: null
--highlight-style kate highlight-style: kate
--syntax-definition mylang.xml syntax-definitions:
- mylang.xml
syntax-definition: mylang.xml
--include-in-header inc.tex include-in-header:
- inc.tex
--include-before-body inc.tex include-before-body:
- inc.tex
--include-after-body inc.tex include-after-body:
- inc.tex
--resource-path .:foo resource-path: ['.','foo']
--request-header foo:bar request-headers:
- ["User-Agent", "Mozilla/5.0"]
--no-check-certificate no-check-certificate: true
Options affecting specific writers
command line defaults file
─────────────────────────────────────────────────────────────────────────
--self-contained self-contained: true
--html-q-tags html-q-tags: true
--ascii ascii: true
--reference-links reference-links: true
--reference-location block reference-location: block
--markdown-headings atx markdown-headings: atx
--top-level-division chapter top-level-division: chapter
--number-sections number-sections: true
--number-offset=1,4 number-offset: \[1,4\]
--listings listings: true
--incremental incremental: true
--slide-level 2 slide-level: 2
--section-divs section-divs: true
--email-obfuscation references email-obfuscation: references
--id-prefix ch1 identifier-prefix: ch1
--title-prefix MySite title-prefix: MySite
--css styles/screen.css \ css:
--css styles/special.css - styles/screen.css
- styles/special.css
--reference-doc my.docx reference-doc: my.docx
--epub-cover-image cover.jpg epub-cover-image: cover.jpg
--epub-metadata meta.xml epub-metadata: meta.xml
--epub-embed-font special.otf \ epub-fonts:
--epub-embed-font headline.otf - special.otf
- headline.otf
--epub-chapter-level 2 epub-chapter-level: 2
--epub-subdirectory="" epub-subdirectory: ''
--ipynb-output best ipynb-output: best
--pdf-engine xelatex pdf-engine: xelatex
--pdf-engine-opt=--shell-escape pdf-engine-opts:
- '-shell-escape'
pdf-engine-opt: '-shell-escape'
Citation rendering
command line defaults file
─────────────────────────────────────────────────────────────────────────
--citeproc citeproc: true
--bibliography logic.bib metadata:
bibliography: logic.bib
--csl ieee.csl metadata:
csl: ieee.csl
--citation-abbreviations ab.json metadata:
citation-abbreviations: ab.json
--natbib cite-method: natbib
--biblatex cite-method: biblatex
cite-method can be citeproc, natbib, or biblatex. This only affects LaTeX output. If you
want to use citeproc to format citations, you should also set `citeproc: true'.
If you need control over when the citeproc processing is done relative to other filters,
you should instead use citeproc in the list of filters (see above).
Math rendering in HTML
command line defaults file
─────────────────────────────────────────────────────────────────────────
--mathjax html-math-method:
method: mathjax
--mathml html-math-method:
method: mathml
--webtex html-math-method:
method: webtex
--katex html-math-method:
method: katex
--gladtex html-math-method:
method: gladtex
In addition to the values listed above, method can have the value plain.
If the command line option accepts a URL argument, an url: field can be added to html-
math-method:.
Options for wrapper scripts
command line defaults file
─────────────────────────────────────────────────────────────────────────
--dump-args dump-args: true
--ignore-args ignore-args: true
TEMPLATES
When the -s/--standalone option is used, pandoc uses a template to add header and footer
material that is needed for a self-standing document. To see the default template that is
used, just type
pandoc -D *FORMAT*
where FORMAT is the name of the output format. A custom template can be specified using
the --template option. You can also override the system default templates for a given
output format FORMAT by putting a file templates/default.*FORMAT* in the user data
directory (see --data-dir, above). Exceptions:
• For odt output, customize the default.opendocument template.
• For pdf output, customize the default.latex template (or the default.context template,
if you use -t context, or the default.ms template, if you use -t ms, or the default.html
template, if you use -t html).
• docx and pptx have no template (however, you can use --reference-doc to customize the
output).
Templates contain variables, which allow for the inclusion of arbitrary information at any
point in the file. They may be set at the command line using the -V/--variable option.
If a variable is not set, pandoc will look for the key in the document’s metadata, which
can be set using either YAML metadata blocks or with the -M/--metadata option. In
addition, some variables are given default values by pandoc. See Variables below for a
list of variables used in pandoc’s default templates.
If you use custom templates, you may need to revise them as pandoc changes. We recommend
tracking the changes in the default templates, and modifying your custom templates
accordingly. An easy way to do this is to fork the pandoc-templates repository and merge
in changes after each pandoc release.
Template syntax
Comments
Anything between the sequence $-- and the end of the line will be treated as a comment and
omitted from the output.
Delimiters
To mark variables and control structures in the template, either $...$ or ${...} may be
used as delimiters. The styles may also be mixed in the same template, but the opening
and closing delimiter must match in each case. The opening delimiter may be followed by
one or more spaces or tabs, which will be ignored. The closing delimiter may be followed
by one or more spaces or tabs, which will be ignored.
To include a literal $ in the document, use $$.
Interpolated variables
A slot for an interpolated variable is a variable name surrounded by matched delimiters.
Variable names must begin with a letter and can contain letters, numbers, _, -, and ..
The keywords it, if, else, endif, for, sep, and endfor may not be used as variable names.
Examples:
$foo$
$foo.bar.baz$
$foo_bar.baz-bim$
$ foo $
${foo}
${foo.bar.baz}
${foo_bar.baz-bim}
${ foo }
Variable names with periods are used to get at structured variable values. So, for
example, employee.salary will return the value of the salary field of the object that is
the value of the employee field.
• If the value of the variable is simple value, it will be rendered verbatim. (Note that
no escaping is done; the assumption is that the calling program will escape the strings
appropriately for the output format.)
• If the value is a list, the values will be concatenated.
• If the value is a map, the string true will be rendered.
• Every other value will be rendered as the empty string.
Conditionals
A conditional begins with if(variable) (enclosed in matched delimiters) and ends with
endif (enclosed in matched delimiters). It may optionally contain an else (enclosed in
matched delimiters). The if section is used if variable has a non-empty value, otherwise
the else section is used (if present). Examples:
$if(foo)$bar$endif$
$if(foo)$
$foo$
$endif$
$if(foo)$
part one
$else$
part two
$endif$
${if(foo)}bar${endif}
${if(foo)}
${foo}
${endif}
${if(foo)}
${ foo.bar }
${else}
no foo!
${endif}
The keyword elseif may be used to simplify complex nested conditionals:
$if(foo)$
XXX
$elseif(bar)$
YYY
$else$
ZZZ
$endif$
For loops
A for loop begins with for(variable) (enclosed in matched delimiters) and ends with endfor
(enclosed in matched delimiters.
• If variable is an array, the material inside the loop will be evaluated repeatedly, with
variable being set to each value of the array in turn, and concatenated.
• If variable is a map, the material inside will be set to the map.
• If the value of the associated variable is not an array or a map, a single iteration
will be performed on its value.
Examples:
$for(foo)$$foo$$sep$, $endfor$
$for(foo)$
- $foo.last$, $foo.first$
$endfor$
${ for(foo.bar) }
- ${ foo.bar.last }, ${ foo.bar.first }
${ endfor }
$for(mymap)$
$it.name$: $it.office$
$endfor$
You may optionally specify a separator between consecutive values using sep (enclosed in
matched delimiters). The material between sep and the endfor is the separator.
${ for(foo) }${ foo }${ sep }, ${ endfor }
Instead of using variable inside the loop, the special anaphoric keyword it may be used.
${ for(foo.bar) }
- ${ it.last }, ${ it.first }
${ endfor }
Partials
Partials (subtemplates stored in different files) may be included by using the name of the
partial, followed by (), for example:
${ styles() }
Partials will be sought in the directory containing the main template. The file name will
be assumed to have the same extension as the main template if it lacks an extension. When
calling the partial, the full name including file extension can also be used:
${ styles.html() }
(If a partial is not found in the directory of the template and the template path is given
as a relative path, it will also be sought in the templates subdirectory of the user data
directory.)
Partials may optionally be applied to variables using a colon:
${ date:fancy() }
${ articles:bibentry() }
If articles is an array, this will iterate over its values, applying the partial
bibentry() to each one. So the second example above is equivalent to
${ for(articles) }
${ it:bibentry() }
${ endfor }
Note that the anaphoric keyword it must be used when iterating over partials. In the
above examples, the bibentry partial should contain it.title (and so on) instead of
articles.title.
Final newlines are omitted from included partials.
Partials may include other partials.
A separator between values of an array may be specified in square brackets, immediately
after the variable name or partial:
${months[, ]}$
${articles:bibentry()[; ]$
The separator in this case is literal and (unlike with sep in an explicit for loop) cannot
contain interpolated variables or other template directives.
Nesting
To ensure that content is “nested,” that is, subsequent lines indented, use the ^
directive:
$item.number$ $^$$item.description$ ($item.price$)
In this example, if item.description has multiple lines, they will all be indented to line
up with the first line:
00123 A fine bottle of 18-year old
Oban whiskey. ($148)
To nest multiple lines to the same level, align them with the ^ directive in the template.
For example:
$item.number$ $^$$item.description$ ($item.price$)
(Available til $item.sellby$.)
will produce
00123 A fine bottle of 18-year old
Oban whiskey. ($148)
(Available til March 30, 2020.)
If a variable occurs by itself on a line, preceded by whitespace and not followed by
further text or directives on the same line, and the variable’s value contains multiple
lines, it will be nested automatically.
Breakable spaces
Normally, spaces in the template itself (as opposed to values of the interpolated
variables) are not breakable, but they can be made breakable in part of the template by
using the ~ keyword (ended with another ~).
$~$This long line may break if the document is rendered
with a short line length.$~$
Pipes
A pipe transforms the value of a variable or partial. Pipes are specified using a slash
(/) between the variable name (or partial) and the pipe name. Example:
$for(name)$
$name/uppercase$
$endfor$
$for(metadata/pairs)$
- $it.key$: $it.value$
$endfor$
$employee:name()/uppercase$
Pipes may be chained:
$for(employees/pairs)$
$it.key/alpha/uppercase$. $it.name$
$endfor$
Some pipes take parameters:
|----------------------|------------|
$for(employee)$
$it.name.first/uppercase/left 20 "| "$$it.name.salary/right 10 " | " " |"$
$endfor$
|----------------------|------------|
Currently the following pipes are predefined:
• pairs: Converts a map or array to an array of maps, each with key and value fields. If
the original value was an array, the key will be the array index, starting with 1.
• uppercase: Converts text to uppercase.
• lowercase: Converts text to lowercase.
• length: Returns the length of the value: number of characters for a textual value,
number of elements for a map or array.
• reverse: Reverses a textual value or array, and has no effect on other values.
• first: Returns the first value of an array, if applied to a non-empty array; otherwise
returns the original value.
• last: Returns the last value of an array, if applied to a non-empty array; otherwise
returns the original value.
• rest: Returns all but the first value of an array, if applied to a non-empty array;
otherwise returns the original value.
• allbutlast: Returns all but the last value of an array, if applied to a non-empty array;
otherwise returns the original value.
• chomp: Removes trailing newlines (and breakable space).
• nowrap: Disables line wrapping on breakable spaces.
• alpha: Converts textual values that can be read as an integer into lowercase alphabetic
characters a..z (mod 26). This can be used to get lettered enumeration from array
indices. To get uppercase letters, chain with uppercase.
• roman: Converts textual values that can be read as an integer into lowercase roman
numerials. This can be used to get lettered enumeration from array indices. To get
uppercase roman, chain with uppercase.
• left n "leftborder" "rightborder": Renders a textual value in a block of width n,
aligned to the left, with an optional left and right border. Has no effect on other
values. This can be used to align material in tables. Widths are positive integers
indicating the number of characters. Borders are strings inside double quotes; literal
" and \ characters must be backslash-escaped.
• right n "leftborder" "rightborder": Renders a textual value in a block of width n,
aligned to the right, and has no effect on other values.
• center n "leftborder" "rightborder": Renders a textual value in a block of width n,
aligned to the center, and has no effect on other values.
Variables
Metadata variables
title, author, date
allow identification of basic aspects of the document. Included in PDF metadata
through LaTeX and ConTeXt. These can be set through a pandoc title block, which
allows for multiple authors, or through a YAML metadata block:
---
author:
- Aristotle
- Peter Abelard
...
Note that if you just want to set PDF or HTML metadata, without including a title
block in the document itself, you can set the title-meta, author-meta, and date-
meta variables. (By default these are set automatically, based on title, author,
and date.) The page title in HTML is set by pagetitle, which is equal to title by
default.
subtitle
document subtitle, included in HTML, EPUB, LaTeX, ConTeXt, and docx documents
abstract
document summary, included in LaTeX, ConTeXt, AsciiDoc, and docx documents
abstract-title
title of abstract, currently used only in HTML and EPUB. This will be set
automatically to a localized value, depending on lang, but can be manually
overridden.
keywords
list of keywords to be included in HTML, PDF, ODT, pptx, docx and AsciiDoc
metadata; repeat as for author, above
subject
document subject, included in ODT, PDF, docx, EPUB, and pptx metadata
description
document description, included in ODT, docx and pptx metadata. Some applications
show this as Comments metadata.
category
document category, included in docx and pptx metadata
Additionally, any root-level string metadata, not included in ODT, docx or pptx metadata
is added as a custom property. The following YAML metadata block for instance:
---
title: 'This is the title'
subtitle: "This is the subtitle"
author:
- Author One
- Author Two
description: |
This is a long
description.
It consists of two paragraphs
...
will include title, author and description as standard document properties and subtitle as
a custom property when converting to docx, ODT or pptx.
Language variables
lang identifies the main language of the document using IETF language tags (following
the BCP 47 standard), such as en or en-GB. The Language subtag lookup tool can
look up or verify these tags. This affects most formats, and controls hyphenation
in PDF output when using LaTeX (through babel and polyglossia) or ConTeXt.
Use native pandoc Divs and Spans with the lang attribute to switch the language:
---
lang: en-GB
...
Text in the main document language (British English).
::: {lang=fr-CA}
> Cette citation est écrite en français canadien.
:::
More text in English. ['Zitat auf Deutsch.']{lang=de}
dir the base script direction, either rtl (right-to-left) or ltr (left-to-right).
For bidirectional documents, native pandoc spans and divs with the dir attribute
(value rtl or ltr) can be used to override the base direction in some output
formats. This may not always be necessary if the final renderer (e.g. the browser,
when generating HTML) supports the Unicode Bidirectional Algorithm.
When using LaTeX for bidirectional documents, only the xelatex engine is fully
supported (use --pdf-engine=xelatex).
Variables for HTML
document-css
Enables inclusion of most of the CSS in the styles.html partial (have a look with
pandoc --print-default-data-file=templates/styles.html). Unless you use --css,
this variable is set to true by default. You can disable it with e.g. pandoc -M
document-css=false.
mainfont
sets the CSS font-family property on the html element.
fontsize
sets the base CSS font-size, which you’d usually set to e.g. 20px, but it also
accepts pt (12pt = 16px in most browsers).
fontcolor
sets the CSS color property on the html element.
linkcolor
sets the CSS color property on all links.
monofont
sets the CSS font-family property on code elements.
monobackgroundcolor
sets the CSS background-color property on code elements and adds extra padding.
linestretch
sets the CSS line-height property on the html element, which is preferred to be
unitless.
backgroundcolor
sets the CSS background-color property on the html element.
margin-left, margin-right, margin-top, margin-bottom
sets the corresponding CSS padding properties on the body element.
To override or extend some CSS for just one document, include for example:
---
header-includes: |
<style>
blockquote {
font-style: italic;
}
tr.even {
background-color: #f0f0f0;
}
td, th {
padding: 0.5em 2em 0.5em 0.5em;
}
tbody {
border-bottom: none;
}
</style>
---
Variables for HTML math
classoption
when using KaTeX, you can render display math equations flush left using YAML
metadata or with -M classoption=fleqn.
Variables for HTML slides
These affect HTML output when [producing slide shows with pandoc].
institute
author affiliations: can be a list when there are multiple authors
revealjs-url
base URL for reveal.js documents (defaults to https://unpkg.com/reveal.js@^4/)
s5-url base URL for S5 documents (defaults to s5/default)
slidy-url
base URL for Slidy documents (defaults to https://www.w3.org/Talks/Tools/Slidy2)
slideous-url
base URL for Slideous documents (defaults to slideous)
title-slide-attributes
additional attributes for the title slide of reveal.js slide shows. See
[background in reveal.js and beamer] for an example.
All reveal.js configuration options are available as variables. To turn off boolean flags
that default to true in reveal.js, use 0.
Variables for Beamer slides
These variables change the appearance of PDF slides using beamer.
aspectratio
slide aspect ratio (43 for 4:3 [default], 169 for 16:9, 1610 for 16:10, 149 for
14:9, 141 for 1.41:1, 54 for 5:4, 32 for 3:2)
`beameroption
add extra beamer option with \setbeameroption{}
institute
author affiliations: can be a list when there are multiple authors
logo logo image for slides
navigation
controls navigation symbols (default is empty for no navigation symbols; other
valid values are frame, vertical, and horizontal)
section-titles
enables “title pages” for new sections (default is true)
theme, colortheme, fonttheme, innertheme, outertheme
beamer themes
themeoptions
options for LaTeX beamer themes (a list).
titlegraphic
image for title slide
Variables for PowerPoint
These variables control the visual aspects of a slide show that are not easily controlled
via templates.
monofont
font to use for code.
Variables for LaTeX
Pandoc uses these variables when creating a PDF with a LaTeX engine.
Layout
block-headings
make \paragraph and \subparagraph (fourth- and fifth-level headings, or fifth- and
sixth-level with book classes) free-standing rather than run-in; requires further
formatting to distinguish from \subsubsection (third- or fourth-level headings).
Instead of using this option, KOMA-Script can adjust headings more extensively:
---
documentclass: scrartcl
header-includes: |
\RedeclareSectionCommand[
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\itshape]{paragraph}
\RedeclareSectionCommand[
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\scshape,
indent=0pt]{subparagraph}
...
classoption
option for document class, e.g. oneside; repeat for multiple options:
---
classoption:
- twocolumn
- landscape
...
documentclass
document class: usually one of the standard classes, article, book, and report; the
KOMA-Script equivalents, scrartcl, scrbook, and scrreprt, which default to smaller
margins; or memoir
geometry
option for geometry package, e.g. margin=1in; repeat for multiple options:
---
geometry:
- top=30mm
- left=20mm
- heightrounded
...
hyperrefoptions
option for hyperref package, e.g. linktoc=all; repeat for multiple options:
---
hyperrefoptions:
- linktoc=all
- pdfwindowui
- pdfpagemode=FullScreen
...
indent if true, pandoc will use document class settings for indentation (the default LaTeX
template otherwise removes indentation and adds space between paragraphs)
linestretch
adjusts line spacing using the setspace package, e.g. 1.25, 1.5
margin-left, margin-right, margin-top, margin-bottom
sets margins if geometry is not used (otherwise geometry overrides these)
pagestyle
control \pagestyle{}: the default article class supports plain (default), empty (no
running heads or page numbers), and headings (section titles in running heads)
papersize
paper size, e.g. letter, a4
secnumdepth
numbering depth for sections (with --number-sections option or numbersections
variable)
beamerarticle
produce an article from Beamer slides
Fonts
fontenc
allows font encoding to be specified through fontenc package (with pdflatex);
default is T1 (see LaTeX font encodings guide)
fontfamily
font package for use with pdflatex: TeX Live includes many options, documented in
the LaTeX Font Catalogue. The default is Latin Modern.
fontfamilyoptions
options for package used as fontfamily; repeat for multiple options. For example,
to use the Libertine font with proportional lowercase (old-style) figures through
the libertinus package:
---
fontfamily: libertinus
fontfamilyoptions:
- osf
- p
...
fontsize
font size for body text. The standard classes allow 10pt, 11pt, and 12pt. To use
another size, set documentclass to one of the KOMA-Script classes, such as scrartcl
or scrbook.
mainfont, sansfont, monofont, mathfont, CJKmainfont
font families for use with xelatex or lualatex: take the name of any system font,
using the fontspec package. CJKmainfont uses the xecjk package.
mainfontoptions, sansfontoptions, monofontoptions, mathfontoptions, CJKoptions
options to use with mainfont, sansfont, monofont, mathfont, CJKmainfont in xelatex
and lualatex. Allow for any choices available through fontspec; repeat for
multiple options. For example, to use the TeX Gyre version of Palatino with
lowercase figures:
---
mainfont: TeX Gyre Pagella
mainfontoptions:
- Numbers=Lowercase
- Numbers=Proportional
...
microtypeoptions
options to pass to the microtype package
Links
colorlinks
add color to link text; automatically enabled if any of linkcolor, filecolor,
citecolor, urlcolor, or toccolor are set
linkcolor, filecolor, citecolor, urlcolor, toccolor
color for internal links, external links, citation links, linked URLs, and links in
table of contents, respectively: uses options allowed by xcolor, including the
dvipsnames, svgnames, and x11names lists
links-as-notes
causes links to be printed as footnotes
Front matter
lof, lot
include list of figures, list of tables
thanks contents of acknowledgments footnote after document title
toc include table of contents (can also be set using --toc/--table-of-contents)
toc-depth
level of section to include in table of contents
BibLaTeX Bibliographies
These variables function when using BibLaTeX for citation rendering.
biblatexoptions
list of options for biblatex
biblio-style
bibliography style, when used with --natbib and --biblatex.
biblio-title
bibliography title, when used with --natbib and --biblatex.
bibliography
bibliography to use for resolving references
natbiboptions
list of options for natbib
Variables for ConTeXt
Pandoc uses these variables when creating a PDF with ConTeXt.
fontsize
font size for body text (e.g. 10pt, 12pt)
headertext, footertext
text to be placed in running header or footer (see ConTeXt Headers and Footers);
repeat up to four times for different placement
indenting
controls indentation of paragraphs, e.g. yes,small,next (see ConTeXt Indentation);
repeat for multiple options
interlinespace
adjusts line spacing, e.g. 4ex (using setupinterlinespace); repeat for multiple
options
layout options for page margins and text arrangement (see ConTeXt Layout); repeat for
multiple options
linkcolor, contrastcolor
color for links outside and inside a page, e.g. red, blue (see ConTeXt Color)
linkstyle
typeface style for links, e.g. normal, bold, slanted, boldslanted, type, cap, small
lof, lot
include list of figures, list of tables
mainfont, sansfont, monofont, mathfont
font families: take the name of any system font (see ConTeXt Font Switching)
margin-left, margin-right, margin-top, margin-bottom
sets margins, if layout is not used (otherwise layout overrides these)
pagenumbering
page number style and location (using setuppagenumbering); repeat for multiple
options
papersize
paper size, e.g. letter, A4, landscape (see ConTeXt Paper Setup); repeat for
multiple options
pdfa adds to the preamble the setup necessary to generate PDF/A of the type specified,
e.g. 1a:2005, 2a. If no type is specified (i.e. the value is set to True, by e.g.
--metadata=pdfa or pdfa: true in a YAML metadata block), 1b:2005 will be used as
default, for reasons of backwards compatibility. Using --variable=pdfa without
specified value is not supported. To successfully generate PDF/A the required ICC
color profiles have to be available and the content and all included files (such as
images) have to be standard conforming. The ICC profiles and output intent may be
specified using the variables pdfaiccprofile and pdfaintent. See also ConTeXt PDFA
for more details.
pdfaiccprofile
when used in conjunction with pdfa, specifies the ICC profile to use in the PDF,
e.g. default.cmyk. If left unspecified, sRGB.icc is used as default. May be
repeated to include multiple profiles. Note that the profiles have to be available
on the system. They can be obtained from ConTeXt ICC Profiles.
pdfaintent
when used in conjunction with pdfa, specifies the output intent for the colors,
e.g. ISO coated v2 300\letterpercent\space (ECI) If left unspecified, sRGB
IEC61966-2.1 is used as default.
toc include table of contents (can also be set using --toc/--table-of-contents)
whitespace
spacing between paragraphs, e.g. none, small (using setupwhitespace)
includesource
include all source documents as file attachments in the PDF file
Variables for wkhtmltopdf
Pandoc uses these variables when creating a PDF with wkhtmltopdf. The --css option also
affects the output.
footer-html, header-html
add information to the header and footer
margin-left, margin-right, margin-top, margin-bottom
set the page margins
papersize
sets the PDF paper size
Variables for man pages
adjusting
adjusts text to left (l), right (r), center (c), or both (b) margins
footer footer in man pages
header header in man pages
hyphenate
if true (the default), hyphenation will be used
section
section number in man pages
Variables for ms
fontfamily
font family (e.g. T or P)
indent paragraph indent (e.g. 2m)
lineheight
line height (e.g. 12p)
pointsize
point size (e.g. 10p)
Variables set automatically
Pandoc sets these variables automatically in response to options or document contents;
users can also modify them. These vary depending on the output format, and include the
following:
body body of document
date-meta
the date variable converted to ISO 8601 YYYY-MM-DD, included in all HTML based
formats (dzslides, epub, html, html4, html5, revealjs, s5, slideous, slidy). The
recognized formats for date are: mm/dd/yyyy, mm/dd/yy, yyyy-mm-dd (ISO 8601), dd MM
yyyy (e.g. either 02 Apr 2018 or 02 April 2018), MM dd, yyyy (e.g. Apr. 02, 2018 or
April 02, 2018),yyyy[mm[dd]]](e.g.20180402, 201804 or 2018).
header-includes
contents specified by -H/--include-in-header (may have multiple values)
include-before
contents specified by -B/--include-before-body (may have multiple values)
include-after
contents specified by -A/--include-after-body (may have multiple values)
meta-json
JSON representation of all of the document’s metadata. Field values are
transformed to the selected output format.
numbersections
non-null value if -N/--number-sections was specified
sourcefile, outputfile
source and destination filenames, as given on the command line. sourcefile can
also be a list if input comes from multiple files, or empty if input is from stdin.
You can use the following snippet in your template to distinguish them:
$if(sourcefile)$
$for(sourcefile)$
$sourcefile$
$endfor$
$else$
(stdin)
$endif$
Similarly, outputfile can be - if output goes to the terminal.
If you need absolute paths, use e.g. $curdir$/$sourcefile$.
curdir working directory from which pandoc is run.
toc non-null value if --toc/--table-of-contents was specified
toc-title
title of table of contents (works only with EPUB, HTML, revealjs, opendocument,
odt, docx, pptx, beamer, LaTeX)
EXTENSIONS
The behavior of some of the readers and writers can be adjusted by enabling or disabling
various extensions.
An extension can be enabled by adding +EXTENSION to the format name and disabled by adding
-EXTENSION. For example, --from markdown_strict+footnotes is strict Markdown with
footnotes enabled, while --from markdown-footnotes-pipe_tables is pandoc’s Markdown
without footnotes or pipe tables.
The markdown reader and writer make by far the most use of extensions. Extensions only
used by them are therefore covered in the section Pandoc’s Markdown below (See Markdown
variants for commonmark and gfm.) In the following, extensions that also work for other
formats are covered.
Note that markdown extensions added to the ipynb format affect Markdown cells in Jupyter
notebooks (as do command-line options like --atx-headers).
Typography
Extension: smart
Interpret straight quotes as curly quotes, --- as em-dashes, -- as en-dashes, and ... as
ellipses. Nonbreaking spaces are inserted after certain abbreviations, such as “Mr.”
This extension can be enabled/disabled for the following formats:
input formats
markdown, commonmark, latex, mediawiki, org, rst, twiki
output formats
markdown, latex, context, rst
enabled by default in
markdown, latex, context (both input and output)
Note: If you are writing Markdown, then the smart extension has the reverse effect: what
would have been curly quotes comes out straight.
In LaTeX, smart means to use the standard TeX ligatures for quotation marks (`` and '' for
double quotes, ` and ' for single quotes) and dashes (-- for en-dash and --- for em-dash).
If smart is disabled, then in reading LaTeX pandoc will parse these characters literally.
In writing LaTeX, enabling smart tells pandoc to use the ligatures when possible; if smart
is disabled pandoc will use unicode quotation mark and dash characters.
Headings and sections
Extension: auto_identifiers
A heading without an explicitly specified identifier will be automatically assigned a
unique identifier based on the heading text.
This extension can be enabled/disabled for the following formats:
input formats
markdown, latex, rst, mediawiki, textile
output formats
markdown, muse
enabled by default in
markdown, muse
The default algorithm used to derive the identifier from the heading text is:
• Remove all formatting, links, etc.
• Remove all footnotes.
• Remove all non-alphanumeric characters, except underscores, hyphens, and periods.
• Replace all spaces and newlines with hyphens.
• Convert all alphabetic characters to lowercase.
• Remove everything up to the first letter (identifiers may not begin with a number or
punctuation mark).
• If nothing is left after this, use the identifier section.
Thus, for example,
Heading Identifier
──────────────────────────────────────────────────────────
Heading identifiers in HTML heading-identifiers-in-html
Maître d'hôtel maître-dhôtel
*Dogs*?--in *my* house? dogs--in-my-house
[HTML], [S5], or [RTF]? html-s5-or-rtf
3. Applications applications
33 section
These rules should, in most cases, allow one to determine the identifier from the heading
text. The exception is when several headings have the same text; in this case, the first
will get an identifier as described above; the second will get the same identifier with -1
appended; the third with -2; and so on.
(However, a different algorithm is used if gfm_auto_identifiers is enabled; see below.)
These identifiers are used to provide link targets in the table of contents generated by
the --toc|--table-of-contents option. They also make it easy to provide links from one
section of a document to another. A link to this section, for example, might look like
this:
See the section on
[heading identifiers](#heading-identifiers-in-html-latex-and-context).
Note, however, that this method of providing links to sections works only in HTML, LaTeX,
and ConTeXt formats.
If the --section-divs option is specified, then each section will be wrapped in a section
(or a div, if html4 was specified), and the identifier will be attached to the enclosing
<section> (or <div>) tag rather than the heading itself. This allows entire sections to
be manipulated using JavaScript or treated differently in CSS.
Extension: ascii_identifiers
Causes the identifiers produced by auto_identifiers to be pure ASCII. Accents are
stripped off of accented Latin letters, and non-Latin letters are omitted.
Extension: gfm_auto_identifiers
Changes the algorithm used by auto_identifiers to conform to GitHub’s method. Spaces are
converted to dashes (-), uppercase characters to lowercase characters, and punctuation
characters other than - and _ are removed. Emojis are replaced by their names.
Math Input
The extensions tex_math_dollars, tex_math_single_backslash, and tex_math_double_backslash
are described in the section about Pandoc’s Markdown.
However, they can also be used with HTML input. This is handy for reading web pages
formatted using MathJax, for example.
Raw HTML/TeX
The following extensions are described in more detail in their respective sections of
Pandoc’s Markdown:
• raw_html allows HTML elements which are not representable in pandoc’s AST to be parsed
as raw HTML. By default, this is disabled for HTML input.
• raw_tex allows raw LaTeX, TeX, and ConTeXt to be included in a document. This extension
can be enabled/disabled for the following formats (in addition to markdown):
input formats
latex, textile, html (environments, \ref, and \eqref only), ipynb
output formats
textile, commonmark
Note: as applied to ipynb, raw_html and raw_tex affect not only raw TeX in markdown
cells, but data with mime type text/html in output cells. Since the ipynb reader
attempts to preserve the richest possible outputs when several options are given, you
will get best results if you disable raw_html and raw_tex when converting to formats
like docx which don’t allow raw html or tex.
• native_divs causes HTML div elements to be parsed as native pandoc Div blocks. If you
want them to be parsed as raw HTML, use -f html-native_divs+raw_html.
• native_spans causes HTML span elements to be parsed as native pandoc Span inlines. If
you want them to be parsed as raw HTML, use -f html-native_spans+raw_html. If you want
to drop all divs and spans when converting HTML to Markdown, you can use pandoc -f html-
native_divs-native_spans -t markdown.
Literate Haskell support
Extension: literate_haskell
Treat the document as literate Haskell source.
This extension can be enabled/disabled for the following formats:
input formats
markdown, rst, latex
output formats
markdown, rst, latex, html
If you append +lhs (or +literate_haskell) to one of the formats above, pandoc will treat
the document as literate Haskell source. This means that
• In Markdown input, “bird track” sections will be parsed as Haskell code rather than
block quotations. Text between \begin{code} and \end{code} will also be treated as
Haskell code. For ATX-style headings the character `=' will be used instead of `#'.
• In Markdown output, code blocks with classes haskell and literate will be rendered using
bird tracks, and block quotations will be indented one space, so they will not be
treated as Haskell code. In addition, headings will be rendered setext-style (with
underlines) rather than ATX-style (with `#' characters). (This is because ghc treats
`#' characters in column 1 as introducing line numbers.)
• In restructured text input, “bird track” sections will be parsed as Haskell code.
• In restructured text output, code blocks with class haskell will be rendered using bird
tracks.
• In LaTeX input, text in code environments will be parsed as Haskell code.
• In LaTeX output, code blocks with class haskell will be rendered inside code
environments.
• In HTML output, code blocks with class haskell will be rendered with class
literatehaskell and bird tracks.
Examples:
pandoc -f markdown+lhs -t html
reads literate Haskell source formatted with Markdown conventions and writes ordinary HTML
(without bird tracks).
pandoc -f markdown+lhs -t html+lhs
writes HTML with the Haskell code in bird tracks, so it can be copied and pasted as
literate Haskell source.
Note that GHC expects the bird tracks in the first column, so indented literate code
blocks (e.g. inside an itemized environment) will not be picked up by the Haskell
compiler.
Other extensions
Extension: empty_paragraphs
Allows empty paragraphs. By default empty paragraphs are omitted.
This extension can be enabled/disabled for the following formats:
input formats
docx, html
output formats
docx, odt, opendocument, html
Extension: native_numbering
Enables native numbering of figures and tables. Enumeration starts at 1.
This extension can be enabled/disabled for the following formats:
output formats
odt, opendocument, docx
Extension: xrefs_name
Links to headings, figures and tables inside the document are substituted with cross-
references that will use the name or caption of the referenced item. The original link
text is replaced once the generated document is refreshed. This extension can be combined
with xrefs_number in which case numbers will appear before the name.
Text in cross-references is only made consistent with the referenced item once the
document has been refreshed.
This extension can be enabled/disabled for the following formats:
output formats
odt, opendocument
Extension: xrefs_number
Links to headings, figures and tables inside the document are substituted with cross-
references that will use the number of the referenced item. The original link text is
discarded. This extension can be combined with xrefs_name in which case the name or
caption numbers will appear after the number.
For the xrefs_number to be useful heading numbers must be enabled in the generated
document, also table and figure captions must be enabled using for example the
native_numbering extension.
Numbers in cross-references are only visible in the final document once it has been
refreshed.
This extension can be enabled/disabled for the following formats:
output formats
odt, opendocument
Extension: styles
When converting from docx, read all docx styles as divs (for paragraph styles) and spans
(for character styles) regardless of whether pandoc understands the meaning of these
styles. This can be used with docx custom styles. Disabled by default.
input formats
docx
Extension: amuse
In the muse input format, this enables Text::Amuse extensions to Emacs Muse markup.
Extension: raw_markdown
In the ipynb input format, this causes Markdown cells to be included as raw Markdown
blocks (allowing lossless round-tripping) rather than being parsed. Use this only when
you are targeting ipynb or a markdown-based output format.
Extension: citations
Some aspects of Pandoc’s Markdown citation syntax are also accepted in org input.
Extension: fancy_lists
Some aspects of Pandoc’s Markdown fancy lists are also accepted in org input, mimicking
the option org-list-allow-alphabetical in Emacs. As in Org Mode, enabling this extension
allows lowercase and uppercase alphabetical markers for ordered lists to be parsed in
addition to arabic ones. Note that for Org, this does not include roman numerals or the #
placeholder that are enabled by the extension in Pandoc’s Markdown.
Extension: element_citations
In the jats output formats, this causes reference items to be replaced with <element-
citation> elements. These elements are not influenced by CSL styles, but all information
on the item is included in tags.
Extension: ntb
In the context output format this enables the use of Natural Tables (TABLE) instead of the
default Extreme Tables (xtables). Natural tables allow more fine-grained global
customization but come at a performance penalty compared to extreme tables.
PANDOC’S MARKDOWN
Pandoc understands an extended and slightly revised version of John Gruber’s Markdown
syntax. This document explains the syntax, noting differences from original Markdown.
Except where noted, these differences can be suppressed by using the markdown_strict
format instead of markdown. Extensions can be enabled or disabled to specify the behavior
more granularly. They are described in the following. See also Extensions above, for
extensions that work also on other formats.
Philosophy
Markdown is designed to be easy to write, and, even more importantly, easy to read:
A Markdown-formatted document should be publishable as-is, as plain text, without
looking like it’s been marked up with tags or formatting instructions. – John
Gruber
This principle has guided pandoc’s decisions in finding syntax for tables, footnotes, and
other extensions.
There is, however, one respect in which pandoc’s aims are different from the original aims
of Markdown. Whereas Markdown was originally designed with HTML generation in mind,
pandoc is designed for multiple output formats. Thus, while pandoc allows the embedding
of raw HTML, it discourages it, and provides other, non-HTMLish ways of representing
important document elements like definition lists, tables, mathematics, and footnotes.
Paragraphs
A paragraph is one or more lines of text followed by one or more blank lines. Newlines
are treated as spaces, so you can reflow your paragraphs as you like. If you need a hard
line break, put two or more spaces at the end of a line.
Extension: escaped_line_breaks
A backslash followed by a newline is also a hard line break. Note: in multiline and grid
table cells, this is the only way to create a hard line break, since trailing spaces in
the cells are ignored.
Headings
There are two kinds of headings: Setext and ATX.
Setext-style headings
A setext-style heading is a line of text “underlined” with a row of = signs (for a level-
one heading) or - signs (for a level-two heading):
A level-one heading
===================
A level-two heading
-------------------
The heading text can contain inline formatting, such as emphasis (see Inline formatting,
below).
ATX-style headings
An ATX-style heading consists of one to six # signs and a line of text, optionally
followed by any number of # signs. The number of # signs at the beginning of the line is
the heading level:
## A level-two heading
### A level-three heading ###
As with setext-style headings, the heading text can contain formatting:
# A level-one heading with a [link](/url) and *emphasis*
Extension: blank_before_header
Original Markdown syntax does not require a blank line before a heading. Pandoc does
require this (except, of course, at the beginning of the document). The reason for the
requirement is that it is all too easy for a # to end up at the beginning of a line by
accident (perhaps through line wrapping). Consider, for example:
I like several of their flavors of ice cream:
#22, for example, and #5.
Extension: space_in_atx_header
Many Markdown implementations do not require a space between the opening #s of an ATX
heading and the heading text, so that #5 bolt and #hashtag count as headings. With this
extension, pandoc does require the space.
Heading identifiers
See also the auto_identifiers extension above.
Extension: header_attributes
Headings can be assigned attributes using this syntax at the end of the line containing
the heading text:
{#identifier .class .class key=value key=value}
Thus, for example, the following headings will all be assigned the identifier foo:
# My heading {#foo}
## My heading ## {#foo}
My other heading {#foo}
---------------
(This syntax is compatible with PHP Markdown Extra.)
Note that although this syntax allows assignment of classes and key/value attributes,
writers generally don’t use all of this information. Identifiers, classes, and key/value
attributes are used in HTML and HTML-based formats such as EPUB and slidy. Identifiers
are used for labels and link anchors in the LaTeX, ConTeXt, Textile, Jira markup, and
AsciiDoc writers.
Headings with the class unnumbered will not be numbered, even if --number-sections is
specified. A single hyphen (-) in an attribute context is equivalent to .unnumbered, and
preferable in non-English documents. So,
# My heading {-}
is just the same as
# My heading {.unnumbered}
If the unlisted class is present in addition to unnumbered, the heading will not be
included in a table of contents. (Currently this feature is only implemented for certain
formats: those based on LaTeX and HTML, PowerPoint, and RTF.)
Extension: implicit_header_references
Pandoc behaves as if reference links have been defined for each heading. So, to link to a
heading
# Heading identifiers in HTML
you can simply write
[Heading identifiers in HTML]
or
[Heading identifiers in HTML][]
or
[the section on heading identifiers][heading identifiers in
HTML]
instead of giving the identifier explicitly:
[Heading identifiers in HTML](#heading-identifiers-in-html)
If there are multiple headings with identical text, the corresponding reference will link
to the first one only, and you will need to use explicit links to link to the others, as
described above.
Like regular reference links, these references are case-insensitive.
Explicit link reference definitions always take priority over implicit heading references.
So, in the following example, the link will point to bar, not to #foo:
# Foo
[foo]: bar
See [foo]
Block quotations
Markdown uses email conventions for quoting blocks of text. A block quotation is one or
more paragraphs or other block elements (such as lists or headings), with each line
preceded by a > character and an optional space. (The > need not start at the left
margin, but it should not be indented more than three spaces.)
> This is a block quote. This
> paragraph has two lines.
>
> 1. This is a list inside a block quote.
> 2. Second item.
A “lazy” form, which requires the > character only on the first line of each block, is
also allowed:
> This is a block quote. This
paragraph has two lines.
> 1. This is a list inside a block quote.
2. Second item.
Among the block elements that can be contained in a block quote are other block quotes.
That is, block quotes can be nested:
> This is a block quote.
>
> > A block quote within a block quote.
If the > character is followed by an optional space, that space will be considered part of
the block quote marker and not part of the indentation of the contents. Thus, to put an
indented code block in a block quote, you need five spaces after the >:
> code
Extension: blank_before_blockquote
Original Markdown syntax does not require a blank line before a block quote. Pandoc does
require this (except, of course, at the beginning of the document). The reason for the
requirement is that it is all too easy for a > to end up at the beginning of a line by
accident (perhaps through line wrapping). So, unless the markdown_strict format is used,
the following does not produce a nested block quote in pandoc:
> This is a block quote.
>> Nested.
Verbatim (code) blocks
Indented code blocks
A block of text indented four spaces (or one tab) is treated as verbatim text: that is,
special characters do not trigger special formatting, and all spaces and line breaks are
preserved. For example,
if (a > 3) {
moveShip(5 * gravity, DOWN);
}
The initial (four space or one tab) indentation is not considered part of the verbatim
text, and is removed in the output.
Note: blank lines in the verbatim text need not begin with four spaces.
Fenced code blocks
Extension: fenced_code_blocks
In addition to standard indented code blocks, pandoc supports fenced code blocks. These
begin with a row of three or more tildes (~) and end with a row of tildes that must be at
least as long as the starting row. Everything between these lines is treated as code. No
indentation is necessary:
~~~~~~~
if (a > 3) {
moveShip(5 * gravity, DOWN);
}
~~~~~~~
Like regular code blocks, fenced code blocks must be separated from surrounding text by
blank lines.
If the code itself contains a row of tildes or backticks, just use a longer row of tildes
or backticks at the start and end:
~~~~~~~~~~~~~~~~
~~~~~~~~~~
code including tildes
~~~~~~~~~~
~~~~~~~~~~~~~~~~
Extension: backtick_code_blocks
Same as fenced_code_blocks, but uses backticks (`) instead of tildes (~).
Extension: fenced_code_attributes
Optionally, you may attach attributes to fenced or backtick code block using this syntax:
~~~~ {#mycode .haskell .numberLines startFrom="100"}
qsort [] = []
qsort (x:xs) = qsort (filter (< x) xs) ++ [x] ++
qsort (filter (>= x) xs)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here mycode is an identifier, haskell and numberLines are classes, and startFrom is an
attribute with value 100. Some output formats can use this information to do syntax
highlighting. Currently, the only output formats that uses this information are HTML,
LaTeX, Docx, Ms, and PowerPoint. If highlighting is supported for your output format and
language, then the code block above will appear highlighted, with numbered lines. (To see
which languages are supported, type pandoc --list-highlight-languages.) Otherwise, the
code block above will appear as follows:
<pre id="mycode" class="haskell numberLines" startFrom="100">
<code>
...
</code>
</pre>
The numberLines (or number-lines) class will cause the lines of the code block to be
numbered, starting with 1 or the value of the startFrom attribute. The lineAnchors (or
line-anchors) class will cause the lines to be clickable anchors in HTML output.
A shortcut form can also be used for specifying the language of the code block:
```haskell
qsort [] = []
```
This is equivalent to:
``` {.haskell}
qsort [] = []
```
If the fenced_code_attributes extension is disabled, but input contains class attribute(s)
for the code block, the first class attribute will be printed after the opening fence as a
bare word.
To prevent all highlighting, use the --no-highlight flag. To set the highlighting style,
use --highlight-style. For more information on highlighting, see Syntax highlighting,
below.
Line blocks
Extension: line_blocks
A line block is a sequence of lines beginning with a vertical bar (|) followed by a space.
The division into lines will be preserved in the output, as will any leading spaces;
otherwise, the lines will be formatted as Markdown. This is useful for verse and
addresses:
| The limerick packs laughs anatomical
| In space that is quite economical.
| But the good ones I've seen
| So seldom are clean
| And the clean ones so seldom are comical
| 200 Main St.
| Berkeley, CA 94718
The lines can be hard-wrapped if needed, but the continuation line must begin with a
space.
| The Right Honorable Most Venerable and Righteous Samuel L.
Constable, Jr.
| 200 Main St.
| Berkeley, CA 94718
Inline formatting (such as emphasis) is allowed in the content, but not block-level
formatting (such as block quotes or lists).
This syntax is borrowed from reStructuredText.
Lists
Bullet lists
A bullet list is a list of bulleted list items. A bulleted list item begins with a bullet
(*, +, or -). Here is a simple example:
* one
* two
* three
This will produce a “compact” list. If you want a “loose” list, in which each item is
formatted as a paragraph, put spaces between the items:
* one
* two
* three
The bullets need not be flush with the left margin; they may be indented one, two, or
three spaces. The bullet must be followed by whitespace.
List items look best if subsequent lines are flush with the first line (after the bullet):
* here is my first
list item.
* and my second.
But Markdown also allows a “lazy” format:
* here is my first
list item.
* and my second.
Block content in list items
A list item may contain multiple paragraphs and other block-level content. However,
subsequent paragraphs must be preceded by a blank line and indented to line up with the
first non-space content after the list marker.
* First paragraph.
Continued.
* Second paragraph. With a code block, which must be indented
eight spaces:
{ code }
Exception: if the list marker is followed by an indented code block, which must begin 5
spaces after the list marker, then subsequent paragraphs must begin two columns after the
last character of the list marker:
* code
continuation paragraph
List items may include other lists. In this case the preceding blank line is optional.
The nested list must be indented to line up with the first non-space character after the
list marker of the containing list item.
* fruits
+ apples
- macintosh
- red delicious
+ pears
+ peaches
* vegetables
+ broccoli
+ chard
As noted above, Markdown allows you to write list items “lazily,” instead of indenting
continuation lines. However, if there are multiple paragraphs or other blocks in a list
item, the first line of each must be indented.
+ A lazy, lazy, list
item.
+ Another one; this looks
bad but is legal.
Second paragraph of second
list item.
Ordered lists
Ordered lists work just like bulleted lists, except that the items begin with enumerators
rather than bullets.
In original Markdown, enumerators are decimal numbers followed by a period and a space.
The numbers themselves are ignored, so there is no difference between this list:
1. one
2. two
3. three
and this one:
5. one
7. two
1. three
Extension: fancy_lists
Unlike original Markdown, pandoc allows ordered list items to be marked with uppercase and
lowercase letters and roman numerals, in addition to Arabic numerals. List markers may be
enclosed in parentheses or followed by a single right-parentheses or period. They must be
separated from the text that follows by at least one space, and, if the list marker is a
capital letter with a period, by at least two spaces.
The fancy_lists extension also allows `#' to be used as an ordered list marker in place of
a numeral:
#. one
#. two
Extension: startnum
Pandoc also pays attention to the type of list marker used, and to the starting number,
and both of these are preserved where possible in the output format. Thus, the following
yields a list with numbers followed by a single parenthesis, starting with 9, and a
sublist with lowercase roman numerals:
9) Ninth
10) Tenth
11) Eleventh
i. subone
ii. subtwo
iii. subthree
Pandoc will start a new list each time a different type of list marker is used. So, the
following will create three lists:
(2) Two
(5) Three
1. Four
* Five
If default list markers are desired, use #.:
#. one
#. two
#. three
Extension: task_lists
Pandoc supports task lists, using the syntax of GitHub-Flavored Markdown.
- [ ] an unchecked task list item
- [x] checked item
Definition lists
Extension: definition_lists
Pandoc supports definition lists, using the syntax of PHP Markdown Extra with some
extensions.
Term 1
: Definition 1
Term 2 with *inline markup*
: Definition 2
{ some code, part of Definition 2 }
Third paragraph of definition 2.
Each term must fit on one line, which may optionally be followed by a blank line, and must
be followed by one or more definitions. A definition begins with a colon or tilde, which
may be indented one or two spaces.
A term may have multiple definitions, and each definition may consist of one or more block
elements (paragraph, code block, list, etc.), each indented four spaces or one tab stop.
The body of the definition (not including the first line) should be indented four spaces.
However, as with other Markdown lists, you can “lazily” omit indentation except at the
beginning of a paragraph or other block element:
Term 1
: Definition
with lazy continuation.
Second paragraph of the definition.
If you leave space before the definition (as in the example above), the text of the
definition will be treated as a paragraph. In some output formats, this will mean greater
spacing between term/definition pairs. For a more compact definition list, omit the space
before the definition:
Term 1
~ Definition 1
Term 2
~ Definition 2a
~ Definition 2b
Note that space between items in a definition list is required. (A variant that loosens
this requirement, but disallows “lazy” hard wrapping, can be activated with
compact_definition_lists: see Non-default extensions, below.)
Numbered example lists
Extension: example_lists
The special list marker @ can be used for sequentially numbered examples. The first list
item with a @ marker will be numbered `1', the next `2', and so on, throughout the
document. The numbered examples need not occur in a single list; each new list using @
will take up where the last stopped. So, for example:
(@) My first example will be numbered (1).
(@) My second example will be numbered (2).
Explanation of examples.
(@) My third example will be numbered (3).
Numbered examples can be labeled and referred to elsewhere in the document:
(@good) This is a good example.
As (@good) illustrates, ...
The label can be any string of alphanumeric characters, underscores, or hyphens.
Note: continuation paragraphs in example lists must always be indented four spaces,
regardless of the length of the list marker. That is, example lists always behave as if
the four_space_rule extension is set. This is because example labels tend to be long, and
indenting content to the first non-space character after the label would be awkward.
Ending a list
What if you want to put an indented code block after a list?
- item one
- item two
{ my code block }
Trouble! Here pandoc (like other Markdown implementations) will treat { my code block }
as the second paragraph of item two, and not as a code block.
To “cut off” the list after item two, you can insert some non-indented content, like an
HTML comment, which won’t produce visible output in any format:
- item one
- item two
<!-- end of list -->
{ my code block }
You can use the same trick if you want two consecutive lists instead of one big list:
1. one
2. two
3. three
<!-- -->
1. uno
2. dos
3. tres
Horizontal rules
A line containing a row of three or more *, -, or _ characters (optionally separated by
spaces) produces a horizontal rule:
* * * *
---------------
Tables
Four kinds of tables may be used. The first three kinds presuppose the use of a fixed-
width font, such as Courier. The fourth kind can be used with proportionally spaced
fonts, as it does not require lining up columns.
Extension: table_captions
A caption may optionally be provided with all 4 kinds of tables (as illustrated in the
examples below). A caption is a paragraph beginning with the string Table: (or just :),
which will be stripped off. It may appear either before or after the table.
Extension: simple_tables
Simple tables look like this:
Right Left Center Default
------- ------ ---------- -------
12 12 12 12
123 123 123 123
1 1 1 1
Table: Demonstration of simple table syntax.
The header and table rows must each fit on one line. Column alignments are determined by
the position of the header text relative to the dashed line below it:
• If the dashed line is flush with the header text on the right side but extends beyond it
on the left, the column is right-aligned.
• If the dashed line is flush with the header text on the left side but extends beyond it
on the right, the column is left-aligned.
• If the dashed line extends beyond the header text on both sides, the column is centered.
• If the dashed line is flush with the header text on both sides, the default alignment is
used (in most cases, this will be left).
The table must end with a blank line, or a line of dashes followed by a blank line.
The column header row may be omitted, provided a dashed line is used to end the table.
For example:
------- ------ ---------- -------
12 12 12 12
123 123 123 123
1 1 1 1
------- ------ ---------- -------
When the header row is omitted, column alignments are determined on the basis of the first
line of the table body. So, in the tables above, the columns would be right, left,
center, and right aligned, respectively.
Extension: multiline_tables
Multiline tables allow header and table rows to span multiple lines of text (but cells
that span multiple columns or rows of the table are not supported). Here is an example:
-------------------------------------------------------------
Centered Default Right Left
Header Aligned Aligned Aligned
----------- ------- --------------- -------------------------
First row 12.0 Example of a row that
spans multiple lines.
Second row 5.0 Here's another one. Note
the blank line between
rows.
-------------------------------------------------------------
Table: Here's the caption. It, too, may span
multiple lines.
These work like simple tables, but with the following differences:
• They must begin with a row of dashes, before the header text (unless the header row is
omitted).
• They must end with a row of dashes, then a blank line.
• The rows must be separated by blank lines.
In multiline tables, the table parser pays attention to the widths of the columns, and the
writers try to reproduce these relative widths in the output. So, if you find that one of
the columns is too narrow in the output, try widening it in the Markdown source.
The header may be omitted in multiline tables as well as simple tables:
----------- ------- --------------- -------------------------
First row 12.0 Example of a row that
spans multiple lines.
Second row 5.0 Here's another one. Note
the blank line between
rows.
----------- ------- --------------- -------------------------
: Here's a multiline table without a header.
It is possible for a multiline table to have just one row, but the row should be followed
by a blank line (and then the row of dashes that ends the table), or the table may be
interpreted as a simple table.
Extension: grid_tables
Grid tables look like this:
: Sample grid table.
+---------------+---------------+--------------------+
| Fruit | Price | Advantages |
+===============+===============+====================+
| Bananas | $1.34 | - built-in wrapper |
| | | - bright color |
+---------------+---------------+--------------------+
| Oranges | $2.10 | - cures scurvy |
| | | - tasty |
+---------------+---------------+--------------------+
The row of =s separates the header from the table body, and can be omitted for a
headerless table. The cells of grid tables may contain arbitrary block elements (multiple
paragraphs, code blocks, lists, etc.). Cells that span multiple columns or rows are not
supported. Grid tables can be created easily using Emacs’ table-mode (M-x table-insert).
Alignments can be specified as with pipe tables, by putting colons at the boundaries of
the separator line after the header:
+---------------+---------------+--------------------+
| Right | Left | Centered |
+==============:+:==============+:==================:+
| Bananas | $1.34 | built-in wrapper |
+---------------+---------------+--------------------+
For headerless tables, the colons go on the top line instead:
+--------------:+:--------------+:------------------:+
| Right | Left | Centered |
+---------------+---------------+--------------------+
Grid Table Limitations
Pandoc does not support grid tables with row spans or column spans. This means that
neither variable numbers of columns across rows nor variable numbers of rows across
columns are supported by Pandoc. All grid tables must have the same number of columns in
each row, and the same number of rows in each column. For example, the Docutils sample
grid tables will not render as expected with Pandoc.
Extension: pipe_tables
Pipe tables look like this:
| Right | Left | Default | Center |
|------:|:-----|---------|:------:|
| 12 | 12 | 12 | 12 |
| 123 | 123 | 123 | 123 |
| 1 | 1 | 1 | 1 |
: Demonstration of pipe table syntax.
The syntax is identical to PHP Markdown Extra tables. The beginning and ending pipe
characters are optional, but pipes are required between all columns. The colons indicate
column alignment as shown. The header cannot be omitted. To simulate a headerless table,
include a header with blank cells.
Since the pipes indicate column boundaries, columns need not be vertically aligned, as
they are in the above example. So, this is a perfectly legal (though ugly) pipe table:
fruit| price
-----|-----:
apple|2.05
pear|1.37
orange|3.09
The cells of pipe tables cannot contain block elements like paragraphs and lists, and
cannot span multiple lines. If any line of the markdown source is longer than the column
width (see --columns), then the table will take up the full text width and the cell
contents will wrap, with the relative cell widths determined by the number of dashes in
the line separating the table header from the table body. (For example ---|- would make
the first column 3/4 and the second column 1/4 of the full text width.) On the other
hand, if no lines are wider than column width, then cell contents will not be wrapped, and
the cells will be sized to their contents.
Note: pandoc also recognizes pipe tables of the following form, as can be produced by
Emacs’ orgtbl-mode:
| One | Two |
|-----+-------|
| my | table |
| is | nice |
The difference is that + is used instead of |. Other orgtbl features are not supported.
In particular, to get non-default column alignment, you’ll need to add colons as above.
Metadata blocks
Extension: pandoc_title_block
If the file begins with a title block
% title
% author(s) (separated by semicolons)
% date
it will be parsed as bibliographic information, not regular text. (It will be used, for
example, in the title of standalone LaTeX or HTML output.) The block may contain just a
title, a title and an author, or all three elements. If you want to include an author but
no title, or a title and a date but no author, you need a blank line:
%
% Author
% My title
%
% June 15, 2006
The title may occupy multiple lines, but continuation lines must begin with leading space,
thus:
% My title
on multiple lines
If a document has multiple authors, the authors may be put on separate lines with leading
space, or separated by semicolons, or both. So, all of the following are equivalent:
% Author One
Author Two
% Author One; Author Two
% Author One;
Author Two
The date must fit on one line.
All three metadata fields may contain standard inline formatting (italics, links,
footnotes, etc.).
Title blocks will always be parsed, but they will affect the output only when the
--standalone (-s) option is chosen. In HTML output, titles will appear twice: once in the
document head – this is the title that will appear at the top of the window in a browser –
and once at the beginning of the document body. The title in the document head can have
an optional prefix attached (--title-prefix or -T option). The title in the body appears
as an H1 element with class “title”, so it can be suppressed or reformatted with CSS. If
a title prefix is specified with -T and no title block appears in the document, the title
prefix will be used by itself as the HTML title.
The man page writer extracts a title, man page section number, and other header and footer
information from the title line. The title is assumed to be the first word on the title
line, which may optionally end with a (single-digit) section number in parentheses.
(There should be no space between the title and the parentheses.) Anything after this is
assumed to be additional footer and header text. A single pipe character (|) should be
used to separate the footer text from the header text. Thus,
% PANDOC(1)
will yield a man page with the title PANDOC and section 1.
% PANDOC(1) Pandoc User Manuals
will also have “Pandoc User Manuals” in the footer.
% PANDOC(1) Pandoc User Manuals | Version 4.0
will also have “Version 4.0” in the header.
Extension: yaml_metadata_block
A YAML metadata block is a valid YAML object, delimited by a line of three hyphens (---)
at the top and a line of three hyphens (---) or three dots (...) at the bottom. A YAML
metadata block may occur anywhere in the document, but if it is not at the beginning, it
must be preceded by a blank line. (Note that, because of the way pandoc concatenates
input files when several are provided, you may also keep the metadata in a separate YAML
file and pass it to pandoc as an argument, along with your Markdown files:
pandoc chap1.md chap2.md chap3.md metadata.yaml -s -o book.html
Just be sure that the YAML file begins with --- and ends with --- or ....) Alternatively,
you can use the --metadata-file option. Using that approach however, you cannot reference
content (like footnotes) from the main markdown input document.
Metadata will be taken from the fields of the YAML object and added to any existing
document metadata. Metadata can contain lists and objects (nested arbitrarily), but all
string scalars will be interpreted as Markdown. Fields with names ending in an underscore
will be ignored by pandoc. (They may be given a role by external processors.) Field
names must not be interpretable as YAML numbers or boolean values (so, for example, yes,
True, and 15 cannot be used as field names).
A document may contain multiple metadata blocks. If two metadata blocks attempt to set
the same field, the value from the second block will be taken.
Each metadata block is handled internally as an independent YAML document. This means,
for example, that any YAML anchors defined in a block cannot be referenced in another
block.
When pandoc is used with -t markdown to create a Markdown document, a YAML metadata block
will be produced only if the -s/--standalone option is used. All of the metadata will
appear in a single block at the beginning of the document.
Note that YAML escaping rules must be followed. Thus, for example, if a title contains a
colon, it must be quoted, and if it contains a backslash escape, then it must be ensured
that it is not treated as a YAML escape sequence. The pipe character (|) can be used to
begin an indented block that will be interpreted literally, without need for escaping.
This form is necessary when the field contains blank lines or block-level formatting:
---
title: 'This is the title: it contains a colon'
author:
- Author One
- Author Two
keywords: [nothing, nothingness]
abstract: |
This is the abstract.
It consists of two paragraphs.
...
The literal block after the | must be indented relative to the line containing the |. If
it is not, the YAML will be invalid and pandoc will not interpret it as metadata. For an
overview of the complex rules governing YAML, see the Wikipedia entry on YAML syntax.
Template variables will be set automatically from the metadata. Thus, for example, in
writing HTML, the variable abstract will be set to the HTML equivalent of the Markdown in
the abstract field:
<p>This is the abstract.</p>
<p>It consists of two paragraphs.</p>
Variables can contain arbitrary YAML structures, but the template must match this
structure. The author variable in the default templates expects a simple list or string,
but can be changed to support more complicated structures. The following combination, for
example, would add an affiliation to the author if one is given:
---
title: The document title
author:
- name: Author One
affiliation: University of Somewhere
- name: Author Two
affiliation: University of Nowhere
...
To use the structured authors in the example above, you would need a custom template:
$for(author)$
$if(author.name)$
$author.name$$if(author.affiliation)$ ($author.affiliation$)$endif$
$else$
$author$
$endif$
$endfor$
Raw content to include in the document’s header may be specified using header-includes;
however, it is important to mark up this content as raw code for a particular output
format, using the raw_attribute extension), or it will be interpreted as markdown. For
example:
header-includes:
- |
```{=latex}
\let\oldsection\section
\renewcommand{\section}[1]{\clearpage\oldsection{#1}}
```
Note: the yaml_metadata_block extension works with commonmark as well as markdown (and it
is enabled by default in gfm and commonmark_x). However, in these formats the following
restrictions apply:
• The YAML metadata block must occur at the beginning of the document (and there can be
only one). If multiple files are given as arguments to pandoc, only the first can be a
YAML metadata block.
• The leaf nodes of the YAML structure are parsed in isolation from each other and from
the rest of the document. So, for example, you can’t use a reference link in these
contexts if the link definition is somewhere else in the document.
Backslash escapes
Extension: all_symbols_escapable
Except inside a code block or inline code, any punctuation or space character preceded by
a backslash will be treated literally, even if it would normally indicate formatting.
Thus, for example, if one writes
*\*hello\**
one will get
<em>*hello*</em>
instead of
<strong>hello</strong>
This rule is easier to remember than original Markdown’s rule, which allows only the
following characters to be backslash-escaped:
\`*_{}[]()>#+-.!
(However, if the markdown_strict format is used, the original Markdown rule will be used.)
A backslash-escaped space is parsed as a nonbreaking space. In TeX output, it will appear
as ~. In HTML and XML output, it will appear as a literal unicode nonbreaking space
character (note that it will thus actually look “invisible” in the generated HTML source;
you can still use the --ascii command-line option to make it appear as an explicit
entity).
A backslash-escaped newline (i.e. a backslash occurring at the end of a line) is parsed as
a hard line break. It will appear in TeX output as \\ and in HTML as <br />. This is a
nice alternative to Markdown’s “invisible” way of indicating hard line breaks using two
trailing spaces on a line.
Backslash escapes do not work in verbatim contexts.
Inline formatting
Emphasis
To emphasize some text, surround it with *s or _, like this:
This text is _emphasized with underscores_, and this
is *emphasized with asterisks*.
Double * or _ produces strong emphasis:
This is **strong emphasis** and __with underscores__.
A * or _ character surrounded by spaces, or backslash-escaped, will not trigger emphasis:
This is * not emphasized *, and \*neither is this\*.
Extension: intraword_underscores
Because _ is sometimes used inside words and identifiers, pandoc does not interpret a _
surrounded by alphanumeric characters as an emphasis marker. If you want to emphasize
just part of a word, use *:
feas*ible*, not feas*able*.
Strikeout
Extension: strikeout
To strikeout a section of text with a horizontal line, begin and end it with ~~. Thus,
for example,
This ~~is deleted text.~~
Superscripts and subscripts
Extension: superscript, subscript
Superscripts may be written by surrounding the superscripted text by ^ characters;
subscripts may be written by surrounding the subscripted text by ~ characters. Thus, for
example,
H~2~O is a liquid. 2^10^ is 1024.
The text between ^...^ or ~...~ may not contain spaces or newlines. If the superscripted
or subscripted text contains spaces, these spaces must be escaped with backslashes. (This
is to prevent accidental superscripting and subscripting through the ordinary use of ~ and
^, and also bad interactions with footnotes.) Thus, if you want the letter P with `a cat'
in subscripts, use P~a\ cat~, not P~a cat~.
Verbatim
To make a short span of text verbatim, put it inside backticks:
What is the difference between `>>=` and `>>`?
If the verbatim text includes a backtick, use double backticks:
Here is a literal backtick `` ` ``.
(The spaces after the opening backticks and before the closing backticks will be ignored.)
The general rule is that a verbatim span starts with a string of consecutive backticks
(optionally followed by a space) and ends with a string of the same number of backticks
(optionally preceded by a space).
Note that backslash-escapes (and other Markdown constructs) do not work in verbatim
contexts:
This is a backslash followed by an asterisk: `\*`.
Extension: inline_code_attributes
Attributes can be attached to verbatim text, just as with fenced code blocks:
`<$>`{.haskell}
Underline
To underline text, use the underline class:
[Underline]{.underline}
Or, without the bracketed_spans extension (but with native_spans):
<span class="underline">Underline</span>
This will work in all output formats that support underline.
Small caps
To write small caps, use the smallcaps class:
[Small caps]{.smallcaps}
Or, without the bracketed_spans extension:
<span class="smallcaps">Small caps</span>
For compatibility with other Markdown flavors, CSS is also supported:
<span style="font-variant:small-caps;">Small caps</span>
This will work in all output formats that support small caps.
Math
Extension: tex_math_dollars
Anything between two $ characters will be treated as TeX math. The opening $ must have a
non-space character immediately to its right, while the closing $ must have a non-space
character immediately to its left, and must not be followed immediately by a digit. Thus,
$20,000 and $30,000 won’t parse as math. If for some reason you need to enclose text in
literal $ characters, backslash-escape them and they won’t be treated as math delimiters.
For display math, use $$ delimiters. (In this case, the delimiters may be separated from
the formula by whitespace. However, there can be no blank lines betwen the opening and
closing $$ delimiters.)
TeX math will be printed in all output formats. How it is rendered depends on the output
format:
LaTeX It will appear verbatim surrounded by \(...\) (for inline math) or \[...\] (for
display math).
Markdown, Emacs Org mode, ConTeXt, ZimWiki
It will appear verbatim surrounded by $...$ (for inline math) or $$...$$ (for
display math).
XWiki It will appear verbatim surrounded by {{formula}}..{{/formula}}.
reStructuredText
It will be rendered using an interpreted text role :math:.
AsciiDoc
For AsciiDoc output format (-t asciidoc) it will appear verbatim surrounded by
latexmath:[$...$] (for inline math) or [latexmath]++++\[...\]+++ (for display
math). For AsciiDoctor output format (-t asciidoctor) the LaTex delimiters ($..$
and \[..\]) are omitted.
Texinfo
It will be rendered inside a @math command.
roff man, Jira markup
It will be rendered verbatim without $’s.
MediaWiki, DokuWiki
It will be rendered inside <math> tags.
Textile
It will be rendered inside <span class="math"> tags.
RTF, OpenDocument
It will be rendered, if possible, using Unicode characters, and will otherwise
appear verbatim.
ODT It will be rendered, if possible, using MathML.
DocBook
If the --mathml flag is used, it will be rendered using MathML in an inlineequation
or informalequation tag. Otherwise it will be rendered, if possible, using Unicode
characters.
Docx It will be rendered using OMML math markup.
FictionBook2
If the --webtex option is used, formulas are rendered as images using CodeCogs or
other compatible web service, downloaded and embedded in the e-book. Otherwise,
they will appear verbatim.
HTML, Slidy, DZSlides, S5, EPUB
The way math is rendered in HTML will depend on the command-line options selected.
Therefore see Math rendering in HTML above.
Raw HTML
Extension: raw_html
Markdown allows you to insert raw HTML (or DocBook) anywhere in a document (except
verbatim contexts, where <, >, and & are interpreted literally). (Technically this is not
an extension, since standard Markdown allows it, but it has been made an extension so that
it can be disabled if desired.)
The raw HTML is passed through unchanged in HTML, S5, Slidy, Slideous, DZSlides, EPUB,
Markdown, CommonMark, Emacs Org mode, and Textile output, and suppressed in other formats.
For a more explicit way of including raw HTML in a Markdown document, see the
raw_attribute extension.
In the CommonMark format, if raw_html is enabled, superscripts, subscripts, strikeouts and
small capitals will be represented as HTML. Otherwise, plain-text fallbacks will be used.
Note that even if raw_html is disabled, tables will be rendered with HTML syntax if they
cannot use pipe syntax.
Extension: markdown_in_html_blocks
Original Markdown allows you to include HTML “blocks”: blocks of HTML between balanced
tags that are separated from the surrounding text with blank lines, and start and end at
the left margin. Within these blocks, everything is interpreted as HTML, not Markdown; so
(for example), * does not signify emphasis.
Pandoc behaves this way when the markdown_strict format is used; but by default, pandoc
interprets material between HTML block tags as Markdown. Thus, for example, pandoc will
turn
<table>
<tr>
<td>*one*</td>
<td>[a link](https://google.com)</td>
</tr>
</table>
into
<table>
<tr>
<td><em>one</em></td>
<td><a href="https://google.com">a link</a></td>
</tr>
</table>
whereas Markdown.pl will preserve it as is.
There is one exception to this rule: text between <script>, <style>, and <textarea> tags
is not interpreted as Markdown.
This departure from original Markdown should make it easier to mix Markdown with HTML
block elements. For example, one can surround a block of Markdown text with <div> tags
without preventing it from being interpreted as Markdown.
Extension: native_divs
Use native pandoc Div blocks for content inside <div> tags. For the most part this should
give the same output as markdown_in_html_blocks, but it makes it easier to write pandoc
filters to manipulate groups of blocks.
Extension: native_spans
Use native pandoc Span blocks for content inside <span> tags. For the most part this
should give the same output as raw_html, but it makes it easier to write pandoc filters to
manipulate groups of inlines.
Extension: raw_tex
In addition to raw HTML, pandoc allows raw LaTeX, TeX, and ConTeXt to be included in a
document. Inline TeX commands will be preserved and passed unchanged to the LaTeX and
ConTeXt writers. Thus, for example, you can use LaTeX to include BibTeX citations:
This result was proved in \cite{jones.1967}.
Note that in LaTeX environments, like
\begin{tabular}{|l|l|}\hline
Age & Frequency \\ \hline
18--25 & 15 \\
26--35 & 33 \\
36--45 & 22 \\ \hline
\end{tabular}
the material between the begin and end tags will be interpreted as raw LaTeX, not as
Markdown.
For a more explicit and flexible way of including raw TeX in a Markdown document, see the
raw_attribute extension.
Inline LaTeX is ignored in output formats other than Markdown, LaTeX, Emacs Org mode, and
ConTeXt.
Generic raw attribute
Extension: raw_attribute
Inline spans and fenced code blocks with a special kind of attribute will be parsed as raw
content with the designated format. For example, the following produces a raw roff ms
block:
```{=ms}
.MYMACRO
blah blah
```
And the following produces a raw html inline element:
This is `<a>html</a>`{=html}
This can be useful to insert raw xml into docx documents, e.g. a pagebreak:
```{=openxml}
<w:p>
<w:r>
<w:br w:type="page"/>
</w:r>
</w:p>
```
The format name should match the target format name (see -t/--to, above, for a list, or
use pandoc --list-output-formats). Use openxml for docx output, opendocument for odt
output, html5 for epub3 output, html4 for epub2 output, and latex, beamer, ms, or html5
for pdf output (depending on what you use for --pdf-engine).
This extension presupposes that the relevant kind of inline code or fenced code block is
enabled. Thus, for example, to use a raw attribute with a backtick code block,
backtick_code_blocks must be enabled.
The raw attribute cannot be combined with regular attributes.
LaTeX macros
Extension: latex_macros
When this extension is enabled, pandoc will parse LaTeX macro definitions and apply the
resulting macros to all LaTeX math and raw LaTeX. So, for example, the following will
work in all output formats, not just LaTeX:
\newcommand{\tuple}[1]{\langle #1 \rangle}
$\tuple{a, b, c}$
Note that LaTeX macros will not be applied if they occur inside a raw span or block marked
with the raw_attribute extension.
When latex_macros is disabled, the raw LaTeX and math will not have macros applied. This
is usually a better approach when you are targeting LaTeX or PDF.
Macro definitions in LaTeX will be passed through as raw LaTeX only if latex_macros is not
enabled. Macro definitions in Markdown source (or other formats allowing raw_tex) will be
passed through regardless of whether latex_macros is enabled.
Links
Markdown allows links to be specified in several ways.
Automatic links
If you enclose a URL or email address in pointy brackets, it will become a link:
<https://google.com>
<sam@green.eggs.ham>
Inline links
An inline link consists of the link text in square brackets, followed by the URL in
parentheses. (Optionally, the URL can be followed by a link title, in quotes.)
This is an [inline link](/url), and here's [one with
a title](https://fsf.org "click here for a good time!").
There can be no space between the bracketed part and the parenthesized part. The link
text can contain formatting (such as emphasis), but the title cannot.
Email addresses in inline links are not autodetected, so they have to be prefixed with
mailto:
[Write me!](mailto:sam@green.eggs.ham)
Reference links
An explicit reference link has two parts, the link itself and the link definition, which
may occur elsewhere in the document (either before or after the link).
The link consists of link text in square brackets, followed by a label in square brackets.
(There cannot be space between the two unless the spaced_reference_links extension is
enabled.) The link definition consists of the bracketed label, followed by a colon and a
space, followed by the URL, and optionally (after a space) a link title either in quotes
or in parentheses. The label must not be parseable as a citation (assuming the citations
extension is enabled): citations take precedence over link labels.
Here are some examples:
[my label 1]: /foo/bar.html "My title, optional"
[my label 2]: /foo
[my label 3]: https://fsf.org (The free software foundation)
[my label 4]: /bar#special 'A title in single quotes'
The URL may optionally be surrounded by angle brackets:
[my label 5]: <http://foo.bar.baz>
The title may go on the next line:
[my label 3]: https://fsf.org
"The free software foundation"
Note that link labels are not case sensitive. So, this will work:
Here is [my link][FOO]
[Foo]: /bar/baz
In an implicit reference link, the second pair of brackets is empty:
See [my website][].
[my website]: http://foo.bar.baz
Note: In Markdown.pl and most other Markdown implementations, reference link definitions
cannot occur in nested constructions such as list items or block quotes. Pandoc lifts
this arbitrary seeming restriction. So the following is fine in pandoc, though not in
most other implementations:
> My block [quote].
>
> [quote]: /foo
Extension: shortcut_reference_links
In a shortcut reference link, the second pair of brackets may be omitted entirely:
See [my website].
[my website]: http://foo.bar.baz
Internal links
To link to another section of the same document, use the automatically generated
identifier (see Heading identifiers). For example:
See the [Introduction](#introduction).
or
See the [Introduction].
[Introduction]: #introduction
Internal links are currently supported for HTML formats (including HTML slide shows and
EPUB), LaTeX, and ConTeXt.
Images
A link immediately preceded by a ! will be treated as an image. The link text will be
used as the image’s alt text:
![movie reel]
[movie reel]: movie.gif
Extension: implicit_figures
An image with nonempty alt text, occurring by itself in a paragraph, will be rendered as a
figure with a caption. The image’s alt text will be used as the caption.
How this is rendered depends on the output format. Some output formats (e.g. RTF) do not
yet support figures. In those formats, you’ll just get an image in a paragraph by itself,
with no caption.
If you just want a regular inline image, just make sure it is not the only thing in the
paragraph. One way to do this is to insert a nonbreaking space after the image:
\
Note that in reveal.js slide shows, an image in a paragraph by itself that has the r-
stretch class will fill the screen, and the caption and figure tags will be omitted.
Extension: link_attributes
Attributes can be set on links and images:
An inline {#id .class width=30 height=20px}
and a reference ![image][ref] with attributes.
[ref]: foo.jpg "optional title" {#id .class key=val key2="val 2"}
(This syntax is compatible with PHP Markdown Extra when only #id and .class are used.)
For HTML and EPUB, all known HTML5 attributes except width and height (but including
srcset and sizes) are passed through as is. Unknown attributes are passed through as
custom attributes, with data- prepended. The other writers ignore attributes that are not
specifically supported by their output format.
The width and height attributes on images are treated specially. When used without a
unit, the unit is assumed to be pixels. However, any of the following unit identifiers
can be used: px, cm, mm, in, inch and %. There must not be any spaces between the number
and the unit. For example:
{ width=50% }
• Dimensions may be converted to a form that is compatible with the output format (for
example, dimensions given in pixels will be converted to inches when converting HTML to
LaTeX). Conversion between pixels and physical measurements is affected by the --dpi
option (by default, 96 dpi is assumed, unless the image itself contains dpi
information).
• The % unit is generally relative to some available space. For example the above example
will render to the following.
• HTML: <img href="file.jpg" style="width: 50%;" />
• LaTeX: \includegraphics[width=0.5\textwidth,height=\textheight]{file.jpg} (If you’re
using a custom template, you need to configure graphicx as in the default template.)
• ConTeXt: \externalfigure[file.jpg][width=0.5\textwidth]
• Some output formats have a notion of a class (ConTeXt) or a unique identifier (LaTeX
\caption), or both (HTML).
• When no width or height attributes are specified, the fallback is to look at the image
resolution and the dpi metadata embedded in the image file.
Divs and Spans
Using the native_divs and native_spans extensions (see above), HTML syntax can be used as
part of markdown to create native Div and Span elements in the pandoc AST (as opposed to
raw HTML). However, there is also nicer syntax available:
Extension: fenced_divs
Allow special fenced syntax for native Div blocks. A Div starts with a fence containing
at least three consecutive colons plus some attributes. The attributes may optionally be
followed by another string of consecutive colons. The attribute syntax is exactly as in
fenced code blocks (see Extension: fenced_code_attributes). As with fenced code blocks,
one can use either attributes in curly braces or a single unbraced word, which will be
treated as a class name. The Div ends with another line containing a string of at least
three consecutive colons. The fenced Div should be separated by blank lines from
preceding and following blocks.
Example:
::::: {#special .sidebar}
Here is a paragraph.
And another.
:::::
Fenced divs can be nested. Opening fences are distinguished because they must have
attributes:
::: Warning ::::::
This is a warning.
::: Danger
This is a warning within a warning.
:::
::::::::::::::::::
Fences without attributes are always closing fences. Unlike with fenced code blocks, the
number of colons in the closing fence need not match the number in the opening fence.
However, it can be helpful for visual clarity to use fences of different lengths to
distinguish nested divs from their parents.
Extension: bracketed_spans
A bracketed sequence of inlines, as one would use to begin a link, will be treated as a
Span with attributes if it is followed immediately by attributes:
[This is *some text*]{.class key="val"}
Footnotes
Extension: footnotes
Pandoc’s Markdown allows footnotes, using the following syntax:
Here is a footnote reference,[^1] and another.[^longnote]
[^1]: Here is the footnote.
[^longnote]: Here's one with multiple blocks.
Subsequent paragraphs are indented to show that they
belong to the previous footnote.
{ some.code }
The whole paragraph can be indented, or just the first
line. In this way, multi-paragraph footnotes work like
multi-paragraph list items.
This paragraph won't be part of the note, because it
isn't indented.
The identifiers in footnote references may not contain spaces, tabs, or newlines. These
identifiers are used only to correlate the footnote reference with the note itself; in the
output, footnotes will be numbered sequentially.
The footnotes themselves need not be placed at the end of the document. They may appear
anywhere except inside other block elements (lists, block quotes, tables, etc.). Each
footnote should be separated from surrounding content (including other footnotes) by blank
lines.
Extension: inline_notes
Inline footnotes are also allowed (though, unlike regular notes, they cannot contain
multiple paragraphs). The syntax is as follows:
Here is an inline note.^[Inlines notes are easier to write, since
you don't have to pick an identifier and move down to type the
note.]
Inline and regular footnotes may be mixed freely.
Citation syntax
Extension: citations
To cite a bibliographic item with an identifier foo, use the syntax @foo. Normal
citations should be included in square brackets, with semicolons separating distinct
items:
Blah blah [@doe99; @smith2000; @smith2004].
How this is rendered depends on the citation style. In an author-date style, it might
render as
Blah blah (Doe 1999, Smith 2000, 2004).
In a footnote style, it might render as
Blah blah.[^1]
[^1]: John Doe, "Frogs," *Journal of Amphibians* 44 (1999);
Susan Smith, "Flies," *Journal of Insects* (2000);
Susan Smith, "Bees," *Journal of Insects* (2004).
See the CSL user documentation for more information about CSL styles and how they affect
rendering.
Unless a citation key start with a letter, digit, or _, and contains only alphanumerics
and single internal punctuation characters (:.#$%&-+?<>~/), it must be surrounded by curly
braces, which are not considered part of the key. In @Foo_bar.baz., the key is
Foo_bar.baz because the final period is not internal punctuation, so it is not included in
the key. In @{Foo_bar.baz.}, the key is Foo_bar.baz., including the final period. In
@Foo_bar--baz, the key is Foo_bar because the repeated internal punctuation characters
terminate the key. The curly braces are recommended if you use URLs as keys:
[@{https://example.com/bib?name=foobar&date=2000}, p. 33].
Citation items may optionally include a prefix, a locator, and a suffix. In
Blah blah [see @doe99, pp. 33-35 and *passim*; @smith04, chap. 1].
The first item (doe99) has prefix see, locator pp. 33-35, and suffix and *passim*. The
second item (smith04) has locator chap. 1 and no prefix or suffix.
Pandoc uses some heuristics to separate the locator from the rest of the subject. It is
sensitive to the locator terms defined in the CSL locale files. Either abbreviated or
unabbreviated forms are accepted. In the en-US locale, locator terms can be written in
either singular or plural forms, as book, bk./bks.; chapter, chap./chaps.; column,
col./cols.; figure, fig./figs.; folio, fol./fols.; number, no./nos.; line, l./ll.; note,
n./nn.; opus, op./opp.; page, p./pp.; paragraph, para./paras.; part, pt./pts.; section,
sec./secs.; sub verbo, s.v./s.vv.; verse, v./vv.; volume, vol./vols.; ¶/¶¶; §/§§. If no
locator term is used, “page” is assumed.
In complex cases, you can force something to be treated as a locator by enclosing it in
curly braces or prevent parsing the suffix as locator by prepending curly braces:
[@smith{ii, A, D-Z}, with a suffix]
[@smith, {pp. iv, vi-xi, (xv)-(xvii)} with suffix here]
[@smith{}, 99 years later]
A minus sign (-) before the @ will suppress mention of the author in the citation. This
can be useful when the author is already mentioned in the text:
Smith says blah [-@smith04].
You can also write an author-in-text citation, by omitting the square brackets:
@smith04 says blah.
@smith04 [p. 33] says blah.
This will cause the author’s name to be rendered, followed by the bibliographical details.
Use this form when you want to make the citation the subject of a sentence.
When you are using a note style, it is usually better to let citeproc create the footnotes
from citations rather than writing an explicit note. If you do write an explicit note
that contains a citation, note that normal citations will be put in parentheses, while
author-in-text citations will not. For this reason, it is sometimes preferable to use the
author-in-text style inside notes when using a note style.
Non-default extensions
The following Markdown syntax extensions are not enabled by default in pandoc, but may be
enabled by adding +EXTENSION to the format name, where EXTENSION is the name of the
extension. Thus, for example, markdown+hard_line_breaks is Markdown with hard line
breaks.
Extension: rebase_relative_paths
Rewrite relative paths for Markdown links and images, depending on the path of the file
containing the link or image link. For each link or image, pandoc will compute the
directory of the containing file, relative to the working directory, and prepend the
resulting path to the link or image path.
The use of this extension is best understood by example. Suppose you have a a
subdirectory for each chapter of a book, chap1, chap2, chap3. Each contains a file
text.md and a number of images used in the chapter. You would like to have
 in chap1/text.md refer to chap1/spider.jpg and 
in chap2/text.md refer to chap2/spider.jpg. To do this, use
pandoc chap*/*.md -f markdown+rebase_relative_paths
Without this extension, you would have to use  in chap1/text.md
and  in chap2/text.md. Links with relative paths will be
rewritten in the same way as images.
Absolute paths and URLs are not changed. Neither are empty paths or paths consisting
entirely of a fragment, e.g., #foo.
Note that relative paths in reference links and images will be rewritten relative to the
file containing the link reference definition, not the file containing the reference link
or image itself, if these differ.
Extension: attributes
Allows attributes to be attached to any inline or block-level element when parsing
commonmark. The syntax for the attributes is the same as that used in header_attributes.
• Attributes that occur immediately after an inline element affect that element. If they
follow a space, then they belong to the space. (Hence, this option subsumes
inline_code_attributes and link_attributes.)
• Attributes that occur immediately before a block element, on a line by themselves,
affect that element.
• Consecutive attribute specifiers may be used, either for blocks or for inlines. Their
attributes will be combined.
• Attributes that occur at the end of the text of a Setext or ATX heading (separated by
whitespace from the text) affect the heading element. (Hence, this option subsumes
header_attributes.)
• Attributes that occur after the opening fence in a fenced code block affect the code
block element. (Hence, this option subsumes fenced_code_attributes.)
• Attributes that occur at the end of a reference link definition affect links that refer
to that definition.
Note that pandoc’s AST does not currently allow attributes to be attached to arbitrary
elements. Hence a Span or Div container will be added if needed.
Extension: old_dashes
Selects the pandoc <= 1.8.2.1 behavior for parsing smart dashes: - before a numeral is an
en-dash, and -- is an em-dash. This option only has an effect if smart is enabled. It is
selected automatically for textile input.
Extension: angle_brackets_escapable
Allow < and > to be backslash-escaped, as they can be in GitHub flavored Markdown but not
original Markdown. This is implied by pandoc’s default all_symbols_escapable.
Extension: lists_without_preceding_blankline
Allow a list to occur right after a paragraph, with no intervening blank space.
Extension: four_space_rule
Selects the pandoc <= 2.0 behavior for parsing lists, so that four spaces indent are
needed for list item continuation paragraphs.
Extension: spaced_reference_links
Allow whitespace between the two components of a reference link, for example,
[foo] [bar].
Extension: hard_line_breaks
Causes all newlines within a paragraph to be interpreted as hard line breaks instead of
spaces.
Extension: ignore_line_breaks
Causes newlines within a paragraph to be ignored, rather than being treated as spaces or
as hard line breaks. This option is intended for use with East Asian languages where
spaces are not used between words, but text is divided into lines for readability.
Extension: east_asian_line_breaks
Causes newlines within a paragraph to be ignored, rather than being treated as spaces or
as hard line breaks, when they occur between two East Asian wide characters. This is a
better choice than ignore_line_breaks for texts that include a mix of East Asian wide
characters and other characters.
Extension: emoji
Parses textual emojis like :smile: as Unicode emoticons.
Extension: tex_math_single_backslash
Causes anything between \( and \) to be interpreted as inline TeX math, and anything
between \[ and \] to be interpreted as display TeX math. Note: a drawback of this
extension is that it precludes escaping ( and [.
Extension: tex_math_double_backslash
Causes anything between \\( and \\) to be interpreted as inline TeX math, and anything
between \\[ and \\] to be interpreted as display TeX math.
Extension: markdown_attribute
By default, pandoc interprets material inside block-level tags as Markdown. This
extension changes the behavior so that Markdown is only parsed inside block-level tags if
the tags have the attribute markdown=1.
Extension: mmd_title_block
Enables a MultiMarkdown style title block at the top of the document, for example:
Title: My title
Author: John Doe
Date: September 1, 2008
Comment: This is a sample mmd title block, with
a field spanning multiple lines.
See the MultiMarkdown documentation for details. If pandoc_title_block or
yaml_metadata_block is enabled, it will take precedence over mmd_title_block.
Extension: abbreviations
Parses PHP Markdown Extra abbreviation keys, like
*[HTML]: Hypertext Markup Language
Note that the pandoc document model does not support abbreviations, so if this extension
is enabled, abbreviation keys are simply skipped (as opposed to being parsed as
paragraphs).
Extension: autolink_bare_uris
Makes all absolute URIs into links, even when not surrounded by pointy braces <...>.
Extension: mmd_link_attributes
Parses multimarkdown style key-value attributes on link and image references. This
extension should not be confused with the link_attributes extension.
This is a reference ![image][ref] with multimarkdown attributes.
[ref]: https://path.to/image "Image title" width=20px height=30px
id=myId class="myClass1 myClass2"
Extension: mmd_header_identifiers
Parses multimarkdown style heading identifiers (in square brackets, after the heading but
before any trailing #s in an ATX heading).
Extension: compact_definition_lists
Activates the definition list syntax of pandoc 1.12.x and earlier. This syntax differs
from the one described above under Definition lists in several respects:
• No blank line is required between consecutive items of the definition list.
• To get a “tight” or “compact” list, omit space between consecutive items; the space
between a term and its definition does not affect anything.
• Lazy wrapping of paragraphs is not allowed: the entire definition must be indented four
spaces.
Extension: gutenberg
Use Project Gutenberg conventions for plain output: all-caps for strong emphasis, surround
by underscores for regular emphasis, add extra blank space around headings.
Extension: sourcepos
Include source position attributes when parsing commonmark. For elements that accept
attributes, a data-pos attribute is added; other elements are placed in a surrounding Div
or Span element with a data-pos attribute.
Extension: short_subsuperscripts
Parse multimarkdown style subscripts and superscripts, which start with a `~' or `^'
character, respectively, and include the alphanumeric sequence that follows. For example:
x^2 = 4
or
Oxygen is O~2.
Markdown variants
In addition to pandoc’s extended Markdown, the following Markdown variants are supported:
• markdown_phpextra (PHP Markdown Extra)
• markdown_github (deprecated GitHub-Flavored Markdown)
• markdown_mmd (MultiMarkdown)
• markdown_strict (Markdown.pl)
• commonmark (CommonMark)
• gfm (Github-Flavored Markdown)
• commonmark_x (CommonMark with many pandoc extensions)
To see which extensions are supported for a given format, and which are enabled by
default, you can use the command
pandoc --list-extensions=FORMAT
where FORMAT is replaced with the name of the format.
Note that the list of extensions for commonmark, gfm, and commonmark_x are defined
relative to default commonmark. So, for example, backtick_code_blocks does not appear as
an extension, since it is enabled by default and cannot be disabled.
CITATIONS
When the --citeproc option is used, pandoc can automatically generate citations and a
bibliography in a number of styles. Basic usage is
pandoc --citeproc myinput.txt
To use this feature, you will need to have
• a document containing citations (see Extension: citations);
• a source of bibliographic data: either an external bibliography file or a list of
references in the document’s YAML metadata
• optionally, a CSL citation style.
Specifying bibliographic data
You can specify an external bibliography using the bibliography metadata field in a YAML
metadata section or the --bibliography command line argument. If you want to use multiple
bibliography files, you can supply multiple --bibliography arguments or set bibliography
metadata field to YAML array. A bibliography may have any of these formats:
Format File extension
──────────────────────────
BibLaTeX .bib
BibTeX .bibtex
CSL JSON .json
CSL YAML .yaml
Note that .bib can be used with both BibTeX and BibLaTeX files; use the extension .bibtex
to force interpretation as BibTeX.
In BibTeX and BibLaTeX databases, pandoc parses LaTeX markup inside fields such as title;
in CSL YAML databases, pandoc Markdown; and in CSL JSON databases, an HTML-like markup:
<i>...</i>
italics
<b>...</b>
bold
<span style="font-variant:small-caps;">...</span> or <sc>...</sc>
small capitals
<sub>...</sub>
subscript
<sup>...</sup>
superscript
<span class="nocase">...</span>
prevent a phrase from being capitalized as title case
As an alternative to specifying a bibliography file using --bibliography or the YAML
metadata field bibliography, you can include the citation data directly in the references
field of the document’s YAML metadata. The field should contain an array of YAML-encoded
references, for example:
---
references:
- type: article-journal
id: WatsonCrick1953
author:
- family: Watson
given: J. D.
- family: Crick
given: F. H. C.
issued:
date-parts:
- - 1953
- 4
- 25
title: 'Molecular structure of nucleic acids: a structure for
deoxyribose nucleic acid'
title-short: Molecular structure of nucleic acids
container-title: Nature
volume: 171
issue: 4356
page: 737-738
DOI: 10.1038/171737a0
URL: https://www.nature.com/articles/171737a0
language: en-GB
...
If both an external bibliography and inline (YAML metadata) references are provided, both
will be used. In case of conflicting ids, the inline references will take precedence.
Note that pandoc can be used to produce such a YAML metadata section from a BibTeX,
BibLaTeX, or CSL JSON bibliography:
pandoc chem.bib -s -f biblatex -t markdown
pandoc chem.json -s -f csljson -t markdown
Indeed, pandoc can convert between any of these citation formats:
pandoc chem.bib -s -f biblatex -t csljson
pandoc chem.yaml -s -f markdown -t biblatex
Running pandoc on a bibliography file with the --citeproc option will create a formatted
bibliography in the format of your choice:
pandoc chem.bib -s --citeproc -o chem.html
pandoc chem.bib -s --citeproc -o chem.pdf
Capitalization in titles
If you are using a bibtex or biblatex bibliography, then observe the following rules:
• English titles should be in title case. Non-English titles should be in sentence case,
and the langid field in biblatex should be set to the relevant language. (The following
values are treated as English: american, british, canadian, english, australian,
newzealand, USenglish, or UKenglish.)
• As is standard with bibtex/biblatex, proper names should be protected with curly braces
so that they won’t be lowercased in styles that call for sentence case. For example:
title = {My Dinner with {Andre}}
• In addition, words that should remain lowercase (or camelCase) should be protected:
title = {Spin Wave Dispersion on the {nm} Scale}
Though this is not necessary in bibtex/biblatex, it is necessary with citeproc, which
stores titles internally in sentence case, and converts to title case in styles that
require it. Here we protect “nm” so that it doesn’t get converted to “Nm” at this
stage.
If you are using a CSL bibliography (either JSON or YAML), then observe the following
rules:
• All titles should be in sentence case.
• Use the language field for non-English titles to prevent their conversion to title case
in styles that call for this. (Conversion happens only if language begins with en or is
left empty.)
• Protect words that should not be converted to title case using this syntax:
Spin wave dispersion on the <span class="nocase">nm</span> scale
Conference Papers, Published vs. Unpublished
For a formally published conference paper, use the biblatex entry type inproceedings
(which will be mapped to CSL paper-conference).
For an unpublished manuscript, use the biblatex entry type unpublished without an
eventtitle field (this entry type will be mapped to CSL manuscript).
For a talk, an unpublished conference paper, or a poster presentation, use the biblatex
entry type unpublished with an eventtitle field (this entry type will be mapped to CSL
speech). Use the biblatex type field to indicate the type, e.g. “Paper”, or “Poster”.
venue and eventdate may be useful too, though eventdate will not be rendered by most CSL
styles. Note that venue is for the event’s venue, unlike location which describes the
publisher’s location; do not use the latter for an unpublished conference paper.
Specifying a citation style
Citations and references can be formatted using any style supported by the Citation Style
Language, listed in the Zotero Style Repository. These files are specified using the
--csl option or the csl (or citation-style) metadata field. By default, pandoc will use
the Chicago Manual of Style author-date format. (You can override this default by copying
a CSL style of your choice to default.csl in your user data directory.) The CSL project
provides further information on finding and editing styles.
The --citation-abbreviations option (or the citation-abbreviations metadata field) may be
used to specify a JSON file containing abbreviations of journals that should be used in
formatted bibliographies when form="short" is specified. The format of the file can be
illustrated with an example:
{ "default": {
"container-title": {
"Lloyd's Law Reports": "Lloyd's Rep",
"Estates Gazette": "EG",
"Scots Law Times": "SLT"
}
}
}
Citations in note styles
Pandoc’s citation processing is designed to allow you to move between author-date,
numerical, and note styles without modifying the markdown source. When you’re using a
note style, avoid inserting footnotes manually. Instead, insert citations just as you
would in an author-date style—for example,
Blah blah [@foo, p. 33].
The footnote will be created automatically. Pandoc will take care of removing the space
and moving the note before or after the period, depending on the setting of notes-after-
punctuation, as described below in Other relevant metadata fields.
In some cases you may need to put a citation inside a regular footnote. Normal citations
in footnotes (such as [@foo, p. 33]) will be rendered in parentheses. In-text citations
(such as @foo [p. 33]) will be rendered without parentheses. (A comma will be added if
appropriate.) Thus:
[^1]: Some studies [@foo; @bar, p. 33] show that
frubulicious zoosnaps are quantical. For a survey
of the literature, see @baz [chap. 1].
Raw content in a style
To include raw content in a prefix, suffix, delimiter, or term, surround it with these
tags indicating the format:
{{jats}}<ref>{{/jats}}
Without the tags, the string will be interpreted as a string and escaped in the output,
rather than being passed through raw.
This feature allows stylesheets to be customized to give different output for different
output formats. However, stylesheets customized in this way will not be usable by other
CSL implementations.
Placement of the bibliography
If the style calls for a list of works cited, it will be placed in a div with id refs, if
one exists:
::: {#refs}
:::
Otherwise, it will be placed at the end of the document. Generation of the bibliography
can be suppressed by setting suppress-bibliography: true in the YAML metadata.
If you wish the bibliography to have a section heading, you can set reference-section-
title in the metadata, or put the heading at the beginning of the div with id refs (if you
are using it) or at the end of your document:
last paragraph...
# References
The bibliography will be inserted after this heading. Note that the unnumbered class will
be added to this heading, so that the section will not be numbered.
Including uncited items in the bibliography
If you want to include items in the bibliography without actually citing them in the body
text, you can define a dummy nocite metadata field and put the citations there:
---
nocite: |
@item1, @item2
...
@item3
In this example, the document will contain a citation for item3 only, but the bibliography
will contain entries for item1, item2, and item3.
It is possible to create a bibliography with all the citations, whether or not they appear
in the document, by using a wildcard:
---
nocite: |
@*
...
For LaTeX output, you can also use natbib or biblatex to render the bibliography. In
order to do so, specify bibliography files as outlined above, and add --natbib or
--biblatex argument to pandoc invocation. Bear in mind that bibliography files have to be
in either BibTeX (for --natbib) or BibLaTeX (for --biblatex) format.
Other relevant metadata fields
A few other metadata fields affect bibliography formatting:
link-citations
If true, citations will be hyperlinked to the corresponding bibliography entries
(for author-date and numerical styles only). Defaults to false.
link-bibliography
If true, DOIs, PMCIDs, PMID, and URLs in bibliographies will be rendered as
hyperlinks. (If an entry contains a DOI, PMCID, PMID, or URL, but none of these
fields are rendered by the style, then the title, or in the absence of a title the
whole entry, will be hyperlinked.) Defaults to true.
lang The lang field will affect how the style is localized, for example in the
translation of labels, the use of quotation marks, and the way items are sorted.
(For backwards compatibility, locale may be used instead of lang, but this use is
deprecated.)
A BCP 47 language tag is expected: for example, en, de, en-US, fr-CA, ug-Cyrl. The
unicode extension syntax (after -u-) may be used to specify options for collation
(sorting) more precisely. Here are some examples:
• zh-u-co-pinyin – Chinese with the Pinyin collation.
• es-u-co-trad – Spanish with the traditional collation (with Ch sorting after C).
• fr-u-kb – French with “backwards” accent sorting (with coté sorting after côte).
• en-US-u-kf-upper – English with uppercase letters sorting before lower (default
is lower before upper).
notes-after-punctuation
If true (the default for note styles), pandoc will put footnote references or
superscripted numerical citations after following punctuation. For example, if the
source contains blah blah [@jones99]., the result will look like blah blah.[^1],
with the note moved after the period and the space collapsed. If false, the space
will still be collapsed, but the footnote will not be moved after the punctuation.
The option may also be used in numerical styles that use superscripts for citation
numbers (but for these styles the default is not to move the citation).
SLIDE SHOWS
You can use pandoc to produce an HTML + JavaScript slide presentation that can be viewed
via a web browser. There are five ways to do this, using S5, DZSlides, Slidy, Slideous,
or reveal.js. You can also produce a PDF slide show using LaTeX beamer, or slides shows
in Microsoft PowerPoint format.
Here’s the Markdown source for a simple slide show, habits.txt:
% Habits
% John Doe
% March 22, 2005
# In the morning
## Getting up
- Turn off alarm
- Get out of bed
## Breakfast
- Eat eggs
- Drink coffee
# In the evening
## Dinner
- Eat spaghetti
- Drink wine
------------------
## Going to sleep
- Get in bed
- Count sheep
To produce an HTML/JavaScript slide show, simply type
pandoc -t FORMAT -s habits.txt -o habits.html
where FORMAT is either s5, slidy, slideous, dzslides, or revealjs.
For Slidy, Slideous, reveal.js, and S5, the file produced by pandoc with the
-s/--standalone option embeds a link to JavaScript and CSS files, which are assumed to be
available at the relative path s5/default (for S5), slideous (for Slideous), reveal.js
(for reveal.js), or at the Slidy website at w3.org (for Slidy). (These paths can be
changed by setting the slidy-url, slideous-url, revealjs-url, or s5-url variables; see
Variables for HTML slides, above.) For DZSlides, the (relatively short) JavaScript and
CSS are included in the file by default.
With all HTML slide formats, the --self-contained option can be used to produce a single
file that contains all of the data necessary to display the slide show, including linked
scripts, stylesheets, images, and videos.
To produce a PDF slide show using beamer, type
pandoc -t beamer habits.txt -o habits.pdf
Note that a reveal.js slide show can also be converted to a PDF by printing it to a file
from the browser.
To produce a Powerpoint slide show, type
pandoc habits.txt -o habits.pptx
Structuring the slide show
By default, the slide level is the highest heading level in the hierarchy that is followed
immediately by content, and not another heading, somewhere in the document. In the
example above, level-1 headings are always followed by level-2 headings, which are
followed by content, so the slide level is 2. This default can be overridden using the
--slide-level option.
The document is carved up into slides according to the following rules:
• A horizontal rule always starts a new slide.
• A heading at the slide level always starts a new slide.
• Headings below the slide level in the hierarchy create headings within a slide. (In
beamer, a “block” will be created. If the heading has the class example, an
exampleblock environment will be used; if it has the class alert, an alertblock will be
used; otherwise a regular block will be used.)
• Headings above the slide level in the hierarchy create “title slides,” which just
contain the section title and help to break the slide show into sections. Non-slide
content under these headings will be included on the title slide (for HTML slide shows)
or in a subsequent slide with the same title (for beamer).
• A title page is constructed automatically from the document’s title block, if present.
(In the case of beamer, this can be disabled by commenting out some lines in the default
template.)
These rules are designed to support many different styles of slide show. If you don’t
care about structuring your slides into sections and subsections, you can either just use
level-1 headings for all slides (in that case, level 1 will be the slide level) or you can
set --slide-level=0.
Note: in reveal.js slide shows, if slide level is 2, a two-dimensional layout will be
produced, with level-1 headings building horizontally and level-2 headings building
vertically. It is not recommended that you use deeper nesting of section levels with
reveal.js unless you set --slide-level=0 (which lets reveal.js produce a one-dimensional
layout and only interprets horizontal rules as slide boundaries).
PowerPoint layout choice
When creating slides, the pptx writer chooses from a number of pre-defined layouts, based
on the content of the slide:
Title Slide
This layout is used for the initial slide, which is generated and filled from the
metadata fields date, author, and title, if they are present.
Section Header
This layout is used for what pandoc calls “title slides”, i.e. slides which start
with a header which is above the slide level in the hierarchy.
Two Content
This layout is used for two-column slides, i.e. slides containing a div with class
columns which contains at least two divs with class column.
Comparison
This layout is used instead of “Two Content” for any two-column slides in which at
least one column contains text followed by non-text (e.g. an image or a table).
Content with Caption
This layout is used for any non-two-column slides which contain text followed by
non-text (e.g. an image or a table).
Blank This layout is used for any slides which only contain blank content, e.g. a slide
containing only speaker notes, or a slide containing only a non-breaking space.
Title and Content
This layout is used for all slides which do not match the criteria for another
layout.
These layouts are chosen from the default pptx reference doc included with pandoc, unless
an alternative reference doc is specified using --reference-doc.
Incremental lists
By default, these writers produce lists that display “all at once.” If you want your lists
to display incrementally (one item at a time), use the -i option. If you want a
particular list to depart from the default, put it in a div block with class incremental
or nonincremental. So, for example, using the fenced div syntax, the following would be
incremental regardless of the document default:
::: incremental
- Eat spaghetti
- Drink wine
:::
or
::: nonincremental
- Eat spaghetti
- Drink wine
:::
While using incremental and nonincremental divs are the recommended method of setting
incremental lists on a per-case basis, an older method is also supported: putting lists
inside a blockquote will depart from the document default (that is, it will display
incrementally without the -i option and all at once with the -i option):
> - Eat spaghetti
> - Drink wine
Both methods allow incremental and nonincremental lists to be mixed in a single document.
Inserting pauses
You can add “pauses” within a slide by including a paragraph containing three dots,
separated by spaces:
# Slide with a pause
content before the pause
. . .
content after the pause
Note: this feature is not yet implemented for PowerPoint output.
Styling the slides
You can change the style of HTML slides by putting customized CSS files in
$DATADIR/s5/default (for S5), $DATADIR/slidy (for Slidy), or $DATADIR/slideous (for
Slideous), where $DATADIR is the user data directory (see --data-dir, above). The
originals may be found in pandoc’s system data directory (generally $CABALDIR/pandoc-
VERSION/s5/default). Pandoc will look there for any files it does not find in the user
data directory.
For dzslides, the CSS is included in the HTML file itself, and may be modified there.
All reveal.js configuration options can be set through variables. For example, themes can
be used by setting the theme variable:
-V theme=moon
Or you can specify a custom stylesheet using the --css option.
To style beamer slides, you can specify a theme, colortheme, fonttheme, innertheme, and
outertheme, using the -V option:
pandoc -t beamer habits.txt -V theme:Warsaw -o habits.pdf
Note that heading attributes will turn into slide attributes (on a <div> or <section>) in
HTML slide formats, allowing you to style individual slides. In beamer, a number of
heading classes and attributes are recognized as frame options and will be passed through
as options to the frame: see Frame attributes in beamer, below.
Speaker notes
Speaker notes are supported in reveal.js, PowerPoint (pptx), and beamer output. You can
add notes to your Markdown document thus:
::: notes
This is my note.
- It can contain Markdown
- like this list
:::
To show the notes window in reveal.js, press s while viewing the presentation. Speaker
notes in PowerPoint will be available, as usual, in handouts and presenter view.
Notes are not yet supported for other slide formats, but the notes will not appear on the
slides themselves.
Columns
To put material in side by side columns, you can use a native div container with class
columns, containing two or more div containers with class column and a width attribute:
:::::::::::::: {.columns}
::: {.column width="40%"}
contents...
:::
::: {.column width="60%"}
contents...
:::
::::::::::::::
Additional columns attributes in beamer
The div containers with classes columns and column can optionally have an align attribute.
The class columns can optionally have a totalwidth attribute or an onlytextwidth class.
:::::::::::::: {.columns align=center totalwidth=8em}
::: {.column width="40%"}
contents...
:::
::: {.column width="60%" align=bottom}
contents...
:::
::::::::::::::
The align attributes on columns and column can be used with the values top, top-baseline,
center and bottom to vertically align the columns. It defaults to top in columns.
The totalwidth attribute limits the width of the columns to the given value.
:::::::::::::: {.columns align=top .onlytextwidth}
::: {.column width="40%" align=center}
contents...
:::
::: {.column width="60%"}
contents...
:::
::::::::::::::
The class onlytextwidth sets the totalwidth to \textwidth.
See Section 12.7 of the Beamer User’s Guide for more details.
Frame attributes in beamer
Sometimes it is necessary to add the LaTeX [fragile] option to a frame in beamer (for
example, when using the minted environment). This can be forced by adding the fragile
class to the heading introducing the slide:
# Fragile slide {.fragile}
All of the other frame attributes described in Section 8.1 of the Beamer User’s Guide may
also be used: allowdisplaybreaks, allowframebreaks, b, c, s, t, environment, label, plain,
shrink, standout, noframenumbering, squeeze. allowframebreaks is recommended especially
for bibliographies, as it allows multiple slides to be created if the content overfills
the frame:
# References {.allowframebreaks}
In addition, the frameoptions attribute may be used to pass arbitrary frame options to a
beamer slide:
# Heading {frameoptions="squeeze,shrink,customoption=foobar"}
Background in reveal.js, beamer, and pptx
Background images can be added to self-contained reveal.js slide shows, beamer slide
shows, and pptx slide shows.
On all slides (beamer, reveal.js, pptx)
With beamer and reveal.js, the configuration option background-image can be used either in
the YAML metadata block or as a command-line variable to get the same image on every
slide.
For pptx, you can use a reference doc in which background images have been set on the
relevant layouts.
parallaxBackgroundImage (reveal.js)
For reveal.js, there is also the reveal.js-native option parallaxBackgroundImage, which
can be used instead of background-image to produce a parallax scrolling background. You
must also set parallaxBackgroundSize, and can optionally set parallaxBackgroundHorizontal
and parallaxBackgroundVertical to configure the scrolling behaviour. See the reveal.js
documentation for more details about the meaning of these options.
In reveal.js’s overview mode, the parallaxBackgroundImage will show up only on the first
slide.
On individual slides (reveal.js, pptx)
To set an image for a particular reveal.js or pptx slide, add {background-
image="/path/to/image"} to the first slide-level heading on the slide (which may even be
empty).
As the HTML writers pass unknown attributes through, other reveal.js background settings
also work on individual slides, including background-size, background-repeat, background-
color, transition, and transition-speed. (The data- prefix will automatically be added.)
Note: data-background-image is also supported in pptx for consistency with reveal.js – if
background-image isn’t found, data-background-image will be checked.
On the title slide (reveal.js, pptx)
To add a background image to the automatically generated title slide for reveal.js, use
the title-slide-attributes variable in the YAML metadata block. It must contain a map of
attribute names and values. (Note that the data- prefix is required here, as it isn’t
added automatically.)
For pptx, pass a reference doc with the background image set on the “Title Slide” layout.
Example (reveal.js)
---
title: My Slide Show
parallaxBackgroundImage: /path/to/my/background_image.png
title-slide-attributes:
data-background-image: /path/to/title_image.png
data-background-size: contain
---
## Slide One
Slide 1 has background_image.png as its background.
## {background-image="/path/to/special_image.jpg"}
Slide 2 has a special image for its background, even though the heading has no content.
EPUBS
EPUB Metadata
EPUB metadata may be specified using the --epub-metadata option, but if the source
document is Markdown, it is better to use a YAML metadata block. Here is an example:
---
title:
- type: main
text: My Book
- type: subtitle
text: An investigation of metadata
creator:
- role: author
text: John Smith
- role: editor
text: Sarah Jones
identifier:
- scheme: DOI
text: doi:10.234234.234/33
publisher: My Press
rights: © 2007 John Smith, CC BY-NC
ibooks:
version: 1.3.4
...
The following fields are recognized:
identifier
Either a string value or an object with fields text and scheme. Valid values for
scheme are ISBN-10, GTIN-13, UPC, ISMN-10, DOI, LCCN, GTIN-14, ISBN-13, Legal
deposit number, URN, OCLC, ISMN-13, ISBN-A, JP, OLCC.
title Either a string value, or an object with fields file-as and type, or a list of such
objects. Valid values for type are main, subtitle, short, collection, edition,
extended.
creator
Either a string value, or an object with fields role, file-as, and text, or a list
of such objects. Valid values for role are MARC relators, but pandoc will attempt
to translate the human-readable versions (like “author” and “editor”) to the
appropriate marc relators.
contributor
Same format as creator.
date A string value in YYYY-MM-DD format. (Only the year is necessary.) Pandoc will
attempt to convert other common date formats.
lang (or legacy: language)
A string value in BCP 47 format. Pandoc will default to the local language if
nothing is specified.
subject
Either a string value, or an object with fields text, authority, and term, or a
list of such objects. Valid values for authority are either a reserved authority
value (currently AAT, BIC, BISAC, CLC, DDC, CLIL, EuroVoc, MEDTOP, LCSH, NDC,
Thema, UDC, and WGS) or an absolute IRI identifying a custom scheme. Valid values
for term are defined by the scheme.
description
A string value.
type A string value.
format A string value.
relation
A string value.
coverage
A string value.
rights A string value.
belongs-to-collection
A string value. identifies the name of a collection to which the EPUB Publication
belongs.
group-position
The group-position field indicates the numeric position in which the EPUB
Publication belongs relative to other works belonging to the same belongs-to-
collection field.
cover-image
A string value (path to cover image).
css (or legacy: stylesheet)
A string value (path to CSS stylesheet).
page-progression-direction
Either ltr or rtl. Specifies the page-progression-direction attribute for the
spine element.
ibooks iBooks-specific metadata, with the following fields:
• version: (string)
• specified-fonts: true|false (default false)
• ipad-orientation-lock: portrait-only|landscape-only
• iphone-orientation-lock: portrait-only|landscape-only
• binding: true|false (default true)
• scroll-axis: vertical|horizontal|default
The epub:type attribute
For epub3 output, you can mark up the heading that corresponds to an EPUB chapter using
the epub:type attribute. For example, to set the attribute to the value prologue, use
this markdown:
# My chapter {epub:type=prologue}
Which will result in:
<body epub:type="frontmatter">
<section epub:type="prologue">
<h1>My chapter</h1>
Pandoc will output <body epub:type="bodymatter">, unless you use one of the following
values, in which case either frontmatter or backmatter will be output.
epub:type of first section epub:type of body
───────────────────────────────────────────────
prologue frontmatter
abstract frontmatter
acknowledgments frontmatter
copyright-page frontmatter
dedication frontmatter
credits frontmatter
keywords frontmatter
imprint frontmatter
contributors frontmatter
other-credits frontmatter
errata frontmatter
revision-history frontmatter
titlepage frontmatter
halftitlepage frontmatter
seriespage frontmatter
foreword frontmatter
preface frontmatter
frontispiece frontmatter
appendix backmatter
colophon backmatter
bibliography backmatter
index backmatter
Linked media
By default, pandoc will download media referenced from any <img>, <audio>, <video> or
<source> element present in the generated EPUB, and include it in the EPUB container,
yielding a completely self-contained EPUB. If you want to link to external media
resources instead, use raw HTML in your source and add data-external="1" to the tag with
the src attribute. For example:
<audio controls="1">
<source src="https://example.com/music/toccata.mp3"
data-external="1" type="audio/mpeg">
</source>
</audio>
If the input format already is HTML then data-external="1" will work as expected for <img>
elements. Similarly, for Markdown, external images can be declared with
{external=1}. Note that this only works for images; the other media elements
have no native representation in pandoc’s AST and requires the use of raw HTML.
EPUB styling
By default, pandoc will include some basic styling contained in its epub.css data file.
(To see this, use pandoc --print-default-data-file epub.css.) To use a different CSS
file, just use the --css command line option. A few inline styles are defined in
addition; these are essential for correct formatting of pandoc’s HTML output.
The document-css variable may be set if the more opinionated styling of pandoc’s default
HTML templates is desired (and in that case the variables defined in Variables for HTML
may be used to fine-tune the style).
JUPYTER NOTEBOOKS
When creating a Jupyter notebook, pandoc will try to infer the notebook structure. Code
blocks with the class code will be taken as code cells, and intervening content will be
taken as Markdown cells. Attachments will automatically be created for images in Markdown
cells. Metadata will be taken from the jupyter metadata field. For example:
---
title: My notebook
jupyter:
nbformat: 4
nbformat_minor: 5
kernelspec:
display_name: Python 2
language: python
name: python2
language_info:
codemirror_mode:
name: ipython
version: 2
file_extension: ".py"
mimetype: "text/x-python"
name: "python"
nbconvert_exporter: "python"
pygments_lexer: "ipython2"
version: "2.7.15"
---
# Lorem ipsum
**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.
``` code
print("hello")
```
## Pyout
``` code
from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")
```
## Image
This image  will be
included as a cell attachment.
If you want to add cell attributes, group cells differently, or add output to code cells,
then you need to include divs to indicate the structure. You can use either fenced divs
or native divs for this. Here is an example:
:::::: {.cell .markdown}
# Lorem
**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.
::::::
:::::: {.cell .code execution_count=1}
``` {.python}
print("hello")
```
::: {.output .stream .stdout}
```
hello
```
:::
::::::
:::::: {.cell .code execution_count=2}
``` {.python}
from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")
```
::: {.output .execute_result execution_count=2}
```{=html}
<script>
console.log("hello");
</script>
<b>HTML</b>
hello
```
:::
::::::
If you include raw HTML or TeX in an output cell, use the [raw attribute][Extension:
fenced_attribute], as shown in the last cell of the example above. Although pandoc can
process “bare” raw HTML and TeX, the result is often interspersed raw elements and normal
textual elements, and in an output cell pandoc expects a single, connected raw block. To
avoid using raw HTML or TeX except when marked explicitly using raw attributes, we
recommend specifying the extensions -raw_html-raw_tex+raw_attribute when translating
between Markdown and ipynb notebooks.
Note that options and extensions that affect reading and writing of Markdown will also
affect Markdown cells in ipynb notebooks. For example, --wrap=preserve will preserve soft
line breaks in Markdown cells; --atx-headers will cause ATX-style headings to be used; and
--preserve-tabs will prevent tabs from being turned to spaces.
SYNTAX HIGHLIGHTING
Pandoc will automatically highlight syntax in fenced code blocks that are marked with a
language name. The Haskell library skylighting is used for highlighting. Currently
highlighting is supported only for HTML, EPUB, Docx, Ms, and LaTeX/PDF output. To see a
list of language names that pandoc will recognize, type pandoc --list-highlight-languages.
The color scheme can be selected using the --highlight-style option. The default color
scheme is pygments, which imitates the default color scheme used by the Python library
pygments (though pygments is not actually used to do the highlighting). To see a list of
highlight styles, type pandoc --list-highlight-styles.
If you are not satisfied with the predefined styles, you can use --print-highlight-style
to generate a JSON .theme file which can be modified and used as the argument to
--highlight-style. To get a JSON version of the pygments style, for example:
pandoc --print-highlight-style pygments > my.theme
Then edit my.theme and use it like this:
pandoc --highlight-style my.theme
If you are not satisfied with the built-in highlighting, or you want highlight a language
that isn’t supported, you can use the --syntax-definition option to load a KDE-style XML
syntax definition file. Before writing your own, have a look at KDE’s repository of
syntax definitions.
To disable highlighting, use the --no-highlight option.
CUSTOM STYLES
Custom styles can be used in the docx and ICML formats.
Output
By default, pandoc’s docx and ICML output applies a predefined set of styles for blocks
such as paragraphs and block quotes, and uses largely default formatting (italics, bold)
for inlines. This will work for most purposes, especially alongside a reference.docx
file. However, if you need to apply your own styles to blocks, or match a preexisting set
of styles, pandoc allows you to define custom styles for blocks and text using divs and
spans, respectively.
If you define a div or span with the attribute custom-style, pandoc will apply your
specified style to the contained elements (with the exception of elements whose function
depends on a style, like headings, code blocks, block quotes, or links). So, for example,
using the bracketed_spans syntax,
[Get out]{custom-style="Emphatically"}, he said.
would produce a docx file with “Get out” styled with character style Emphatically.
Similarly, using the fenced_divs syntax,
Dickinson starts the poem simply:
::: {custom-style="Poetry"}
| A Bird came down the Walk---
| He did not know I saw---
:::
would style the two contained lines with the Poetry paragraph style.
For docx output, styles will be defined in the output file as inheriting from normal text,
if the styles are not yet in your reference.docx. If they are already defined, pandoc
will not alter the definition.
This feature allows for greatest customization in conjunction with pandoc filters. If you
want all paragraphs after block quotes to be indented, you can write a filter to apply the
styles necessary. If you want all italics to be transformed to the Emphasis character
style (perhaps to change their color), you can write a filter which will transform all
italicized inlines to inlines within an Emphasis custom-style span.
For docx output, you don’t need to enable any extensions for custom styles to work.
Input
The docx reader, by default, only reads those styles that it can convert into pandoc
elements, either by direct conversion or interpreting the derivation of the input
document’s styles.
By enabling the styles extension in the docx reader (-f docx+styles), you can produce
output that maintains the styles of the input document, using the custom-style class.
Paragraph styles are interpreted as divs, while character styles are interpreted as spans.
For example, using the custom-style-reference.docx file in the test directory, we have the
following different outputs:
Without the +styles extension:
$ pandoc test/docx/custom-style-reference.docx -f docx -t markdown
This is some text.
This is text with an *emphasized* text style. And this is text with a
**strengthened** text style.
> Here is a styled paragraph that inherits from Block Text.
And with the extension:
$ pandoc test/docx/custom-style-reference.docx -f docx+styles -t markdown
::: {custom-style="First Paragraph"}
This is some text.
:::
::: {custom-style="Body Text"}
This is text with an [emphasized]{custom-style="Emphatic"} text style.
And this is text with a [strengthened]{custom-style="Strengthened"}
text style.
:::
::: {custom-style="My Block Style"}
> Here is a styled paragraph that inherits from Block Text.
:::
With these custom styles, you can use your input document as a reference-doc while
creating docx output (see below), and maintain the same styles in your input and output
files.
CUSTOM READERS AND WRITERS
Pandoc can be extended with custom readers and writers written in Lua. (Pandoc includes a
Lua interpreter, so Lua need not be installed separately.)
To use a custom reader or writer, simply specify the path to the Lua script in place of
the input or output format. For example:
pandoc -t data/sample.lua
pandoc -f my_custom_markup_language.lua -t latex -s
A custom reader is a Lua script that defines one function, Reader, which takes a string as
input and returns a Pandoc AST. See the Lua filters documentation for documentation of
the functions that are available for creating pandoc AST elements. For parsing, the lpeg
parsing library is available by default. To see a sample custom reader:
pandoc --print-default-data-file creole.lua
If you want your custom reader to have access to reader options (e.g. the tab stop
setting), you give your Reader function a second options parameter.
A custom writer is a Lua script that defines a function that specifies how to render each
element in a Pandoc AST. To see a documented example which you can modify according to
your needs:
pandoc --print-default-data-file sample.lua
Note that custom writers have no default template. If you want to use --standalone with a
custom writer, you will need to specify a template manually using --template or add a new
default template with the name default.NAME_OF_CUSTOM_WRITER.lua to the templates
subdirectory of your user data directory (see Templates).
REPRODUCIBLE BUILDS
Some of the document formats pandoc targets (such as EPUB, docx, and ODT) include build
timestamps in the generated document. That means that the files generated on successive
builds will differ, even if the source does not. To avoid this, set the SOURCE_DATE_EPOCH
environment variable, and the timestamp will be taken from it instead of the current time.
SOURCE_DATE_EPOCH should contain an integer unix timestamp (specifying the number of
second since midnight UTC January 1, 1970).
Some document formats also include a unique identifier. For EPUB, this can be set
explicitly by setting the identifier metadata field (see EPUB Metadata, above).
A NOTE ON SECURITY
If you use pandoc to convert user-contributed content in a web application, here are some
things to keep in mind:
1. Although pandoc itself will not create or modify any files other than those you
explicitly ask it create (with the exception of temporary files used in producing
PDFs), a filter or custom writer could in principle do anything on your file system.
Please audit filters and custom writers very carefully before using them.
2. Several input formats (including HTML, Org, and RST) support include directives that
allow the contents of a file to be included in the output. An untrusted attacker could
use these to view the contents of files on the file system. (Using the --sandbox
option can protect against this threat.)
3. Several output formats (including RTF, FB2, HTML with --self-contained, EPUB, Docx, and
ODT) will embed encoded or raw images into the output file. An untrusted attacker
could exploit this to view the contents of non-image files on the file system. (Using
the --sandbox option can protect against this threat, but will also prevent including
images in these formats.)
4. If your application uses pandoc as a Haskell library (rather than shelling out to the
executable), it is possible to use it in a mode that fully isolates pandoc from your
file system, by running the pandoc operations in the PandocPure monad. See the
document Using the pandoc API for more details.
5. Pandoc’s parsers can exhibit pathological performance on some corner cases. It is wise
to put any pandoc operations under a timeout, to avoid DOS attacks that exploit these
issues. If you are using the pandoc executable, you can add the command line options
+RTS -M512M -RTS (for example) to limit the heap size to 512MB. Note that the
commonmark parser (including commonmark_x and gfm) is much less vulnerable to
pathological performance than the markdown parser, so it is a better choice when
processing untrusted input.
6. The HTML generated by pandoc is not guaranteed to be safe. If raw_html is enabled for
the Markdown input, users can inject arbitrary HTML. Even if raw_html is disabled,
users can include dangerous content in URLs and attributes. To be safe, you should run
all the generated HTML through an HTML sanitizer.
AUTHORS
Copyright 2006–2022 John MacFarlane (jgm@berkeley.edu). Released under the GPL, version 2
or greater. This software carries no warranty of any kind. (See COPYRIGHT for full
copyright and warranty notices.) For a full list of contributors, see the file AUTHORS.md
in the pandoc source code.
The Pandoc source code may be downloaded from <https://hackage.haskell.org/package/pandoc>
or <https://github.com/jgm/pandoc/releases>. Further documentation is available at
<https://pandoc.org>.