Provided by: tidy_5.6.0-10_amd64 bug

NAME

       tidy - check, correct, and pretty-print HTML(5) files

SYNOPSIS

       tidy [options] [file ...] [options] [file ...] ...

DESCRIPTION

       Tidy reads HTML, XHTML, and XML files and writes cleaned-up markup.  For HTML variants, it
       detects, reports, and corrects many common coding errors and strives to produce visually
       equivalent markup that is both conformant to the HTML specifications and that works in
       most browsers.

       A common use of Tidy is to convert plain HTML to XHTML.  For generic XML files, Tidy is
       limited to correcting basic well-formedness errors and pretty printing.

       If no input file is specified, Tidy reads the standard input.  If no output file is
       specified, Tidy writes the tidied markup to the standard output.  If no error file is
       specified, Tidy writes messages to the standard error.

OPTIONS

       Tidy supports two different kinds of options.  Purely command-line options, starting with
       a single dash '-', can only be used on the command-line, not in configuration files.  They
       are listed in the first part of this section.  Configuration options, on the other hand,
       can either be passed on the command line, starting with two dashes --, or specified in a
       configuration file, using the option name, followed by a colon :, plus the value, without
       the starting dashes. They are listed in the second part of this section, with a sample
       config file.

       For command-line options that expect a numerical argument, a default is assumed if no
       meaningful value can be found.  On the other hand, configuration options cannot be used
       without a value; a configuration option without a value is simply discarded and reported
       as an error.

       Using a command-line option is sometimes equivalent to setting the value of a
       configuration option.  The equivalent option and value are shown in parentheses in the
       list below, as they would appear in a configuration file.  For example, -quiet, -q (quiet:
       yes) means that using the command-line option -quiet or -q is equivalent to setting the
       configuration option quiet to yes.

       Single-letter command-line options without an associated value can be combined; for
       example '-i', '-m' and '-u' may be combined as '-imu'.

   File manipulation
       -output <file>, -o <file> (output-file: <file>)
              write output to the specified <file>

       -config <file>
              set configuration options from the specified <file>

       -file <file>, -f <file> (error-file: <file>)
              write errors and warnings to the specified <file>

       -modify, -m (write-back: yes)
              modify the original input files

   Processing directives
       -indent, -i (indent: auto)
              indent element content

       -wrap <column>, -w <column> (wrap: <column>)
              wrap text at the specified <column>. 0 is assumed if <column> is missing. When this
              option is omitted, the default of the configuration option 'wrap' applies.

       -upper, -u (uppercase-tags: yes)
              force tags to upper case

       -clean, -c (clean: yes)
              replace FONT, NOBR and CENTER tags with CSS

       -bare, -b (bare: yes)
              strip out smart quotes and em dashes, etc.

       -gdoc, -g (gdoc: yes)
              produce clean version of html exported by Google Docs

       -numeric, -n (numeric-entities: yes)
              output numeric rather than named entities

       -errors, -e (markup: no)
              show only errors and warnings

       -quiet, -q (quiet: yes)
              suppress nonessential output

       -omit (omit-optional-tags: yes)
              omit optional start tags and end tags

       -xml (input-xml: yes)
              specify the input is well formed XML

       -asxml, -asxhtml (output-xhtml: yes)
              convert HTML to well formed XHTML

       -ashtml (output-html: yes)
              force XHTML to well formed HTML

       -access <level> (accessibility-check: <level>)
              do additional accessibility checks (<level> = 0, 1, 2, 3). 0 is assumed if <level>
              is missing.

   Character encodings
       -raw   output values above 127 without conversion to entities

       -ascii use ISO-8859-1 for input, US-ASCII for output

       -latin0
              use ISO-8859-15 for input, US-ASCII for output

       -latin1
              use ISO-8859-1 for both input and output

       -iso2022
              use ISO-2022 for both input and output

       -utf8  use UTF-8 for both input and output

       -mac   use MacRoman for input, US-ASCII for output

       -win1252
              use Windows-1252 for input, US-ASCII for output

       -ibm858
              use IBM-858 (CP850+Euro) for input, US-ASCII for output

       -utf16le
              use UTF-16LE for both input and output

       -utf16be
              use UTF-16BE for both input and output

       -utf16 use UTF-16 for both input and output

       -big5  use Big5 for both input and output

       -shiftjis
              use Shift_JIS for both input and output

   Miscellaneous
       -version, -v
              show the version of Tidy

       -help, -h, -?
              list the command line options

       -help-config
              list all configuration options

       -help-env
              show information about the environment and runtime configuration

       -show-config
              list the current configuration settings

       -export-config
              list the current configuration settings, suitable for a config file

       -export-default-config
              list the default configuration settings, suitable for a config file

       -help-option <option>
              show a description of the <option>

       -language <lang> (language: <lang>)
              set Tidy's output language to <lang>. Specify '-language help' for more help. Use
              before output-causing arguments to ensure the language takes effect, e.g.,`tidy
              -lang es -lang help`.

   XML
       -xml-help
              list the command line options in XML format

       -xml-config
              list all configuration options in XML format

       -xml-strings
              output all of Tidy's strings in XML format

       -xml-error-strings
              output error constants and strings in XML format

       -xml-options-strings
              output option descriptions in XML format

       Configuration options can be specified by preceding each option with -- at the command
       line, followed by its desired value, OR by placing the options and values in a
       configuration file, and telling tidy to read that file with the -config option:

          tidy --option1 value1 --option2 value2 ...
          tidy -config config-file  ...

       Configuration options can be conveniently grouped in a single config file.  A Tidy
       configuration file is simply a text file, where each option is listed on a separate line
       in the form

          option1: value1
          option2: value2
          etc.

       The permissible values for a given option depend on the option's Type.  There are five
       Types: Boolean, AutoBool, DocType, Enum, and String.  Boolean Types allow any of yes/no,
       y/n, true/false, t/f, 1/0.  AutoBools allow auto in addition to the values allowed by
       Booleans.  Integer Types take non-negative integers.  String Types generally have no
       defaults, and you should provide them in non-quoted form (unless you wish the output to
       contain the literal quotes).

       Enum, Encoding, and DocType Types have a fixed repertoire of items, which are listed in
       the Supported values sections below.

       You only need to provide options and values for those whose defaults you wish to override,
       although you may wish to include some already-defaulted options and values for the sake of
       documentation and explicitness.

       Here is a sample config file, with at least one example of each of the five Types:

           // sample Tidy configuration options
           output-xhtml: yes
           add-xml-decl: no
           doctype: strict
           char-encoding: ascii
           indent: auto
           wrap: 76
           repeated-attributes: keep-last
           error-file: errs.txt

       Below is a summary and brief description of each of the options.  They are listed
       alphabetically within each category.

   Document Display options

       --gnu-emacs Boolean (no if unset)
              This option specifies if Tidy should change the format for reporting errors and
              warnings to a format that is more easily parsed by GNU Emacs.

       --markup Boolean (yes if unset)
              This option specifies if Tidy should generate a pretty printed version of the
              markup. Note that Tidy won't generate a pretty printed version if it finds
              significant errors (see force-output).

       --mute String
              Use this option to prevent Tidy from displaying certain types of report output, for
              example, for conditions that you wish to ignore.

              This option takes a list of one or more keys indicating the message type to mute.
              You can discover these message keys by using the mute-id configuration option and
              examining Tidy's output.

              See also: --mute-id

       --mute-id Boolean (no if unset)
              This option indicates whether or not Tidy should display message ID's with each of
              its error reports. This could be useful if you wanted to use the mute configuration
              option in order to filter out certain report messages.

              See also: --mute

       --quiet Boolean (no if unset)
              When enabled, this option limits Tidy's non-document output to report only document
              warnings and errors.

       --show-body-only Enum (no if unset)
              Supported values: no, yes, auto

              This option specifies if Tidy should print only the contents of the body tag as an
              HTML fragment.

              If set to auto, this is performed only if the body tag has been inferred.

              Useful for incorporating existing whole pages as a portion of another page.

              This option has no effect if XML output is requested.

       --show-errors Integer (6 if unset)
              This option specifies the number Tidy uses to determine if further errors should be
              shown. If set to 0, then no errors are shown.

       --show-info Boolean (yes if unset)
              This option specifies if Tidy should display info-level messages.

       --show-warnings Boolean (yes if unset)
              This option specifies if Tidy should suppress warnings. This can be useful when a
              few errors are hidden in a flurry of warnings.

   Document In and Out options

       --add-meta-charset Boolean (no if unset)
              This option, when enabled, adds a <meta> element and sets the charset attribute to
              the encoding of the document. Set this option to yes to enable it.

       --add-xml-decl Boolean (no if unset)
              This option specifies if Tidy should add the XML declaration when outputting XML or
              XHTML.

              Note that if the input already includes an <?xml ... ?> declaration then this
              option will be ignored.

              If the encoding for the output is different from ascii, one of the utf* encodings,
              or raw, then the declaration is always added as required by the XML standard.

              See also: --char-encoding, --output-encoding

       --add-xml-space Boolean (no if unset)
              This option specifies if Tidy should add xml:space="preserve" to elements such as
              <pre>, <style> and <script> when generating XML.

              This is needed if the whitespace in such elements is to be parsed appropriately
              without having access to the DTD.

       --doctype String (auto if unset)
              This option specifies the DOCTYPE declaration generated by Tidy.

              If set to omit the output won't contain a DOCTYPE declaration. Note this this also
              implies numeric-entities is set to yes.

              If set to html5 the DOCTYPE is set to <!DOCTYPE html>.

              If set to auto (the default) Tidy will use an educated guess based upon the
              contents of the document. Note that selecting this option will not change the
              current document's DOCTYPE on output.

              If set to strict, Tidy will set the DOCTYPE to the HTML4 or XHTML1 strict DTD.

              If set to loose, the DOCTYPE is set to the HTML4 or XHTML1 loose (transitional)
              DTD.

              Alternatively, you can supply a string for the formal public identifier (FPI).

              For example:

              doctype: "-//ACME//DTD HTML 3.14159//EN"

              If you specify the FPI for an XHTML document, Tidy will set the system identifier
              to an empty string. For an HTML document, Tidy adds a system identifier only if one
              was already present in order to preserve the processing mode of some browsers. Tidy
              leaves the DOCTYPE for generic XML documents unchanged.

              This option does not offer a validation of document conformance.

       --input-xml Boolean (no if unset)
              This option specifies if Tidy should use the XML parser rather than the error
              correcting HTML parser.

       --output-html Boolean (no if unset)
              This option specifies if Tidy should generate pretty printed output, writing it as
              HTML.

       --output-xhtml Boolean (no if unset)
              This option specifies if Tidy should generate pretty printed output, writing it as
              extensible HTML.

              This option causes Tidy to set the DOCTYPE and default namespace as appropriate to
              XHTML, and will use the corrected value in output regardless of other sources.

              For XHTML, entities can be written as named or numeric entities according to the
              setting of numeric-entities.

              The original case of tags and attributes will be preserved, regardless of other
              options.

       --output-xml Boolean (no if unset)
              This option specifies if Tidy should pretty print output, writing it as well-formed
              XML.

              Any entities not defined in XML 1.0 will be written as numeric entities to allow
              them to be parsed by an XML parser.

              The original case of tags and attributes will be preserved, regardless of other
              options.

   File Input-Output options

       --error-file String
              This option specifies the error file Tidy uses for errors and warnings. Normally
              errors and warnings are output to stderr.

              See also: --output-file

       --keep-time Boolean (no if unset)
              This option specifies if Tidy should keep the original modification time of files
              that Tidy modifies in place.

              Setting the option to yes allows you to tidy files without changing the file
              modification date, which may be useful with certain tools that use the modification
              date for things such as automatic server deployment.

              Note this feature is not supported on some platforms.

       --output-file String
              This option specifies the output file Tidy uses for markup. Normally markup is
              written to stdout.

              See also: --error-file

       --write-back Boolean (no if unset)
              This option specifies if Tidy should write back the tidied markup to the same file
              it read from.

              You are advised to keep copies of important files before tidying them, as on rare
              occasions the result may not be what you expect.

   Diagnostics options

       --accessibility-check Enum (0 (Tidy Classic) if unset)
              Supported values: 0 (Tidy Classic), 1 (Priority 1 Checks), 2 (Priority 2 Checks), 3
              (Priority 3 Checks)

              This option specifies what level of accessibility checking, if any, that Tidy
              should perform.

              Level 0 (Tidy Classic) is equivalent to Tidy Classic's accessibility checking.

              For more information on Tidy's accessibility checking, visit Tidy's Accessibility
              Page at http://www.html-tidy.org/accessibility/.

       --force-output Boolean (no if unset)
              This option specifies if Tidy should produce output even if errors are encountered.

              Use this option with care; if Tidy reports an error, this means Tidy was not able
              to (or is not sure how to) fix the error, so the resulting output may not reflect
              your intention.

       --show-meta-change Boolean (no if unset)
              This option enables a message whenever Tidy changes the content attribute of a meta
              charset declaration to match the encoding of the document. Set this option to yes
              to enable it.

       --warn-proprietary-attributes Boolean (yes if unset)
              This option specifies if Tidy should warn on proprietary attributes.

   Encoding options

       --char-encoding Encoding (utf8 if unset)
              Supported values: raw, ascii, latin0, latin1, utf8, iso2022, mac, win1252, ibm858,
              utf16le, utf16be, utf16, big5, shiftjis

              This option specifies the character encoding Tidy uses for input, and when set,
              automatically chooses an appropriate character encoding to be used for output. The
              output encoding Tidy chooses may be different from the input encoding.

              For ascii, latin0, ibm858, mac, and win1252 input encodings, the output-encoding
              option will automatically be set to ascii. You can set output-encoding manually to
              override this.

              For other input encodings, the output-encoding option will automatically be set to
              the the same value.

              Regardless of the preset value, you can set output-encoding manually to override
              this.

              Tidy is not an encoding converter. Although the Latin and UTF encodings can be
              mixed freely, it is not possible to convert Asian encodings to Latin encodings with
              Tidy.

              See also: --input-encoding, --output-encoding

       --input-encoding Encoding (utf8 if unset)
              Supported values: raw, ascii, latin0, latin1, utf8, iso2022, mac, win1252, ibm858,
              utf16le, utf16be, utf16, big5, shiftjis

              This option specifies the character encoding Tidy uses for input. Tidy makes
              certain assumptions about some of the input encodings.

              For ascii, Tidy will accept Latin-1 (ISO-8859-1) character values and convert them
              to entities as necessary.

              For raw, Tidy will make no assumptions about the character values and will pass
              them unchanged to output.

              For mac and win1252, vendor specific characters values will be accepted and
              converted to entities as necessary.

              Asian encodings such as iso2022 will be handled appropriately assuming the
              corresponding output-encoding is also specified.

              Tidy is not an encoding converter. Although the Latin and UTF encodings can be
              mixed freely, it is not possible to convert Asian encodings to Latin encodings with
              Tidy.

              See also: --char-encoding

       --newline Enum (LF if unset)
              Supported values: LF, CRLF, CR

              The default is appropriate to the current platform.

              Genrally CRLF on PC-DOS, Windows and OS/2; CR on Classic Mac OS; and LF everywhere
              else (Linux, macOS, and Unix).

       --output-bom Enum (auto if unset)
              Supported values: no, yes, auto

              This option specifies if Tidy should write a Unicode Byte Order Mark character
              (BOM; also known as Zero Width No-Break Space; has value of U+FEFF) to the
              beginning of the output, and only applies to UTF-8 and UTF-16 output encodings.

              If set to auto this option causes Tidy to write a BOM to the output only if a BOM
              was present at the beginning of the input.

              A BOM is always written for XML/XHTML output using UTF-16 output encodings.

       --output-encoding Encoding (utf8 if unset)
              Supported values: raw, ascii, latin0, latin1, utf8, iso2022, mac, win1252, ibm858,
              utf16le, utf16be, utf16, big5, shiftjis

              This option specifies the character encoding Tidy uses for output. Some of the
              output encodings affect whether or not some characters are translated to entities,
              although in all cases, some entities will be written according to other Tidy
              configuration options.

              For ascii, mac, and win1252 output encodings, entities will be used for all
              characters with values over 127.

              For raw output, Tidy will write values above 127 without translating them to
              entities.

              Output using latin1 will cause Tidy to write character values higher than 255 as
              entities.

              The UTF family such as utf8 will write output in the respective UTF encoding.

              Asian output encodings such as iso2022 will write output in the specified encoding,
              assuming a corresponding input-encoding was specified.

              Tidy is not an encoding converter. Although the Latin and UTF encodings can be
              mixed freely, it is not possible to convert Asian encodings to Latin encodings with
              Tidy.

              See also: --char-encoding

   Cleanup options

       --bare Boolean (no if unset)
              This option specifies if Tidy should strip Microsoft specific HTML from Word 2000
              documents, and output spaces rather than non-breaking spaces where they exist in
              the input.

       --clean Boolean (no if unset)
              This option specifies if Tidy should perform cleaning of some legacy presentational
              tags (currently <i>, <b>, <center> when enclosed within appropriate inline tags,
              and <font>). If set to yes, then the legacy tags will be replaced with CSS <style>
              tags and structural markup as appropriate.

       --drop-empty-elements Boolean (yes if unset)
              This option specifies if Tidy should discard empty elements.

       --drop-empty-paras Boolean (yes if unset)
              This option specifies if Tidy should discard empty paragraphs.

       --drop-proprietary-attributes Boolean (no if unset)
              This option specifies if Tidy should strip out proprietary attributes, such as
              Microsoft data binding attributes. Additionally attributes that aren't permitted in
              the output version of HTML will be dropped if used with strict-tags-attributes.

       --gdoc Boolean (no if unset)
              This option specifies if Tidy should enable specific behavior for cleaning up HTML
              exported from Google Docs.

       --logical-emphasis Boolean (no if unset)
              This option specifies if Tidy should replace any occurrence of <i> with <em> and
              any occurrence of <b> with <strong>. Any attributes are preserved unchanged.

              This option can be set independently of the clean option.

       --merge-divs Enum (auto if unset)
              Supported values: no, yes, auto

              This option can be used to modify the behavior of clean when set to yes.

              This option specifies if Tidy should merge nested <div> such as
              <div><div>...</div></div>.

              If set to auto the attributes of the inner <div> are moved to the outer one. Nested
              <div> with id attributes are not merged.

              If set to yes the attributes of the inner <div> are discarded with the exception of
              class and style.

              See also: --clean, --merge-spans

       --merge-spans Enum (auto if unset)
              Supported values: no, yes, auto

              This option can be used to modify the behavior of clean when set to yes.

              This option specifies if Tidy should merge nested <span> such as
              <span><span>...</span></span>.

              The algorithm is identical to the one used by merge-divs.

              See also: --clean, --merge-divs

       --word-2000 Boolean (no if unset)
              This option specifies if Tidy should go to great pains to strip out all the surplus
              stuff Microsoft Word 2000 inserts when you save Word documents as "Web pages". It
              doesn't handle embedded images or VML.

              You should consider saving using Word's Save As..., and choosing Web Page,
              Filtered.

   Entities options

       --ascii-chars Boolean (no if unset)
              Can be used to modify behavior of the clean option when set to yes.

              If set to yes when using clean, &emdash;, &rdquo;, and other named character
              entities are downgraded to their closest ASCII equivalents.

              See also: --clean

       --ncr Boolean (yes if unset)
              This option specifies if Tidy should allow numeric character references.

       --numeric-entities Boolean (no if unset)
              This option specifies if Tidy should output entities other than the built-in HTML
              entities (&amp;, &lt;, &gt;, and &quot;) in the numeric rather than the named
              entity form.

              Only entities compatible with the DOCTYPE declaration generated are used.

              Entities that can be represented in the output encoding are translated
              correspondingly.

              See also: --doctype, --preserve-entities

       --preserve-entities Boolean (no if unset)
              This option specifies if Tidy should preserve well-formed entities as found in the
              input.

       --quote-ampersand Boolean (yes if unset)
              This option specifies if Tidy should output unadorned & characters as &amp;.

       --quote-marks Boolean (no if unset)
              This option specifies if Tidy should output " characters as &quot; as is preferred
              by some editing environments.

              The apostrophe character ' is written out as &#39; since many web browsers don't
              yet support &apos;.

       --quote-nbsp Boolean (yes if unset)
              This option specifies if Tidy should output non-breaking space characters as
              entities, rather than as the Unicode character value 160 (decimal).

   Repair options

       --alt-text String
              This option specifies the default alt= text Tidy uses for <img> attributes when the
              alt= attribute is missing.

              Use with care, as it is your responsibility to make your documents accessible to
              people who cannot see the images.

       --anchor-as-name Boolean (yes if unset)
              This option controls the deletion or addition of the name attribute in elements
              where it can serve as anchor.

              If set to yes a name attribute, if not already existing, is added along an existing
              id attribute if the DTD allows it.

              If set to no any existing name attribute is removed if an id attribute exists or
              has been added.

       --assume-xml-procins Boolean (no if unset)
              This option specifies if Tidy should change the parsing of processing instructions
              to require ?> as the terminator rather than >.

              This option is automatically set if the input is in XML.

       --coerce-endtags Boolean (yes if unset)
              This option specifies if Tidy should coerce a start tag into an end tag in cases
              where it looks like an end tag was probably intended; for example, given

              <span>foo <b>bar<b> baz</span>

              Tidy will output

              <span>foo <b>bar</b> baz</span>

       --css-prefix String (c if unset)
              This option specifies the prefix that Tidy uses for styles rules.

              By default, c will be used.

       --custom-tags Enum (no if unset)
              Supported values: no, blocklevel, empty, inline, pre

              This option enables the use of tags for autonomous custom elements, e.g. <flag-
              icon> with Tidy. Custom tags are disabled if this value is no. Other settings -
              blocklevel, empty, inline, and pre will treat all detected custom tags accordingly.

              The use of new-blocklevel-tags, new-empty-tags, new-inline-tags, or new-pre-tags
              will override the treatment of custom tags by this configuration option. This may
              be useful if you have different types of custom tags.

              When enabled these tags are determined during the processing of your document using
              opening tags; matching closing tags will be recognized accordingly, and unknown
              closing tags will be discarded.

              See also: --new-blocklevel-tags, --new-empty-tags, --new-inline-tags, --new-pre-
              tags

       --enclose-block-text Boolean (no if unset)
              This option specifies if Tidy should insert a <p> element to enclose any text it
              finds in any element that allows mixed content for HTML transitional but not HTML
              strict.

       --enclose-text Boolean (no if unset)
              This option specifies if Tidy should enclose any text it finds in the body element
              within a <p> element.

              This is useful when you want to take existing HTML and use it with a style sheet.

       --escape-scripts Boolean (yes if unset)
              This option causes items that look like closing tags, like </g to be escaped to
              <\/g. Set this option to no if you do not want this.

       --fix-backslash Boolean (yes if unset)
              This option specifies if Tidy should replace backslash characters \ in URLs with
              forward slashes /.

       --fix-bad-comments Enum (auto if unset)
              Supported values: no, yes, auto

              This option specifies if Tidy should replace unexpected hyphens with = characters
              when it comes across adjacent hyphens.

              The default is auto will which will act as no for HTML5 document types, and yes for
              all other document types.

              HTML has abandonded SGML comment syntax, and allows adjacent hypens for all
              versions of HTML, although XML and XHTML do not. If you plan to support older
              browsers that require SGML comment syntax, then consider setting this value to yes.

       --fix-style-tags Boolean (yes if unset)
              This option specifies if Tidy should move all style tags to the head of the
              document.

       --fix-uri Boolean (yes if unset)
              This option specifies if Tidy should check attribute values that carry URIs for
              illegal characters and if such are found, escape them as HTML4 recommends.

       --literal-attributes Boolean (no if unset)
              This option specifies how Tidy deals with whitespace characters within attribute
              values.

              If the value is no Tidy normalizes attribute values by replacing any newline or tab
              with a single space, and further by replacing any contiguous whitespace with a
              single space.

              To force Tidy to preserve the original, literal values of all attributes and ensure
              that whitespace within attribute values is passed through unchanged, set this
              option to yes.

       --lower-literals Boolean (yes if unset)
              This option specifies if Tidy should convert the value of an attribute that takes a
              list of predefined values to lower case.

              This is required for XHTML documents.

       --repeated-attributes Enum (keep-last if unset)
              Supported values: keep-first, keep-last

              This option specifies if Tidy should keep the first or last attribute, if an
              attribute is repeated, e.g. has two align attributes.

              See also: --join-classes, --join-styles

       --skip-nested Boolean (yes if unset)
              This option specifies that Tidy should skip nested tags when parsing script and
              style data.

       --strict-tags-attributes Boolean (no if unset)
              This options ensures that tags and attributes are applicable for the version of
              HTML that Tidy outputs. When set to yes and the output document type is a strict
              doctype, then Tidy will report errors. If the output document type is a loose or
              transitional doctype, then Tidy will report warnings.

              Additionally if drop-proprietary-attributes is enabled, then not applicable
              attributes will be dropped, too.

              When set to no, these checks are not performed.

       --uppercase-attributes Enum (no if unset)
              Supported values: no, yes, preserve

              This option specifies if Tidy should output attribute names in upper case.

              When set to no, attribute names will be written in lower case. Specifying yes will
              output attribute names in upper case, and preserve can used to leave attribute
              names untouched.

              When using XML input, the original case is always preserved.

       --uppercase-tags Boolean (no if unset)
              This option specifies if Tidy should output tag names in upper case.

              The default is no which results in lower case tag names, except for XML input where
              the original case is preserved.

   Transformation options

       --decorate-inferred-ul Boolean (no if unset)
              This option specifies if Tidy should decorate inferred <ul> elements with some CSS
              markup to avoid indentation to the right.

       --escape-cdata Boolean (no if unset)
              This option specifies if Tidy should convert <![CDATA[]]> sections to normal text.

       --hide-comments Boolean (no if unset)
              This option specifies if Tidy should not print out comments.

       --join-classes Boolean (no if unset)
              This option specifies if Tidy should combine class names to generate a single, new
              class name if multiple class assignments are detected on an element.

       --join-styles Boolean (yes if unset)
              This option specifies if Tidy should combine styles to generate a single, new style
              if multiple style values are detected on an element.

       --merge-emphasis Boolean (yes if unset)
              This option specifies if Tidy should merge nested <b> and <i> elements; for
              example, for the case

              <b class="rtop-2">foo <b class="r2-2">bar</b> baz</b>,

              Tidy will output <b class="rtop-2">foo bar baz</b>.

       --replace-color Boolean (no if unset)
              This option specifies if Tidy should replace numeric values in color attributes
              with HTML/XHTML color names where defined, e.g. replace #ffffff with white.

   Teaching Tidy options

       --new-blocklevel-tags Tag Names
              Supported values: tagX, tagY, ...

              This option specifies new block-level tags. This option takes a space or comma
              separated list of tag names.

              Unless you declare new tags, Tidy will refuse to generate a tidied file if the
              input includes previously unknown tags.

              Note you can't change the content model for elements such as <table>, <ul>, <ol>
              and <dl>.

              This option is ignored in XML mode.

              See also: --new-empty-tags, --new-inline-tags, --new-pre-tags, --custom-tags

       --new-empty-tags Tag Names
              Supported values: tagX, tagY, ...

              This option specifies new empty inline tags. This option takes a space or comma
              separated list of tag names.

              Unless you declare new tags, Tidy will refuse to generate a tidied file if the
              input includes previously unknown tags.

              Remember to also declare empty tags as either inline or blocklevel.

              This option is ignored in XML mode.

              See also: --new-blocklevel-tags, --new-inline-tags, --new-pre-tags, --custom-tags

       --new-inline-tags Tag Names
              Supported values: tagX, tagY, ...

              This option specifies new non-empty inline tags. This option takes a space or comma
              separated list of tag names.

              Unless you declare new tags, Tidy will refuse to generate a tidied file if the
              input includes previously unknown tags.

              This option is ignored in XML mode.

              See also: --new-blocklevel-tags, --new-empty-tags, --new-pre-tags, --custom-tags

       --new-pre-tags Tag Names
              Supported values: tagX, tagY, ...

              This option specifies new tags that are to be processed in exactly the same way as
              HTML's <pre> element. This option takes a space or comma separated list of tag
              names.

              Unless you declare new tags, Tidy will refuse to generate a tidied file if the
              input includes previously unknown tags.

              Note you cannot as yet add new CDATA elements.

              This option is ignored in XML mode.

              See also: --new-blocklevel-tags, --new-empty-tags, --new-inline-tags, --custom-tags

   Pretty Print options

       --break-before-br Boolean (no if unset)
              This option specifies if Tidy should output a line break before each <br> element.

       --indent Enum (no if unset)
              Supported values: no, yes, auto

              This option specifies if Tidy should indent block-level tags.

              If set to auto Tidy will decide whether or not to indent the content of tags such
              as <title>, <h1>-<h6>, <li>, <td>, or <p> based on the content including a block-
              level element.

              Setting indent to yes can expose layout bugs in some browsers.

              Use the option indent-spaces to control the number of spaces or tabs output per
              level of indent, and indent-with-tabs to specify whether spaces or tabs are used.

              See also: --indent-spaces

       --indent-attributes Boolean (no if unset)
              This option specifies if Tidy should begin each attribute on a new line.

       --indent-cdata Boolean (no if unset)
              This option specifies if Tidy should indent <![CDATA[]]> sections.

       --indent-spaces Integer (2 if unset)
              This option specifies the number of spaces or tabs that Tidy uses to indent content
              when indent is enabled.

              Note that the default value for this option is dependent upon the value of indent-
              with-tabs (see also).

              See also: --indent

       --indent-with-tabs Boolean (no if unset)
              This option specifies if Tidy should indent with tabs instead of spaces, assuming
              indent is yes.

              Set it to yes to indent using tabs instead of the default spaces.

              Use the option indent-spaces to control the number of tabs output per level of
              indent. Note that when indent-with-tabs is enabled the default value of indent-
              spaces is reset to 1.

              Note tab-size controls converting input tabs to spaces. Set it to zero to retain
              input tabs.

       --keep-tabs Boolean (no if unset)
              With the default no Tidy will replace all source tabs with spaces, controlled by
              the option tab-size, and the current line offset. Of course, except in the special
              blocks/elements enumerated below, this will later be reduced to just one space.

              If set yes this option specifies Tidy should keep certain tabs found in the source,
              but only in preformatted blocks like <pre>, and other CDATA elements like <script>,
              <style>, and other pseudo elements like <?php ... ?>. As always, all other tabs, or
              sequences of tabs, in the source will continue to be replaced with a space.

       --omit-optional-tags Boolean (no if unset)
              This option specifies if Tidy should omit optional start tags and end tags when
              generating output.

              Setting this option causes all tags for the <html>, <head>, and <body> elements to
              be omitted from output, as well as such end tags as </p>, </li>, </dt>, </dd>,
              </option>, </tr>, </td>, and </th>.

              This option is ignored for XML output.

       --priority-attributes Attributes Names
              Supported values: attributeX, attributeY, ...

              This option allows prioritizing the writing of attributes in tidied documents,
              allowing them to written before the other attributes of an element. For example,
              you might specify that id and name are written before every other attribute.

              This option takes a space or comma separated list of attribute names.

       --punctuation-wrap Boolean (no if unset)
              This option specifies if Tidy should line wrap after some Unicode or Chinese
              punctuation characters.

       --sort-attributes Enum (none if unset)
              Supported values: none, alpha

              This option specifies that Tidy should sort attributes within an element using the
              specified sort algorithm. If set to alpha, the algorithm is an ascending alphabetic
              sort.

              When used while sorting with priority-attributes, any attribute sorting will take
              place after the priority attributes have been output.

              See also: --priority-attributes

       --tab-size Integer (8 if unset)
              This option specifies the number of columns that Tidy uses between successive tab
              stops. It is used to map tabs to spaces when reading the input.

       --tidy-mark Boolean (yes if unset)
              This option specifies if Tidy should add a meta element to the document head to
              indicate that the document has been tidied.

              Tidy won't add a meta element if one is already present.

       --vertical-space Enum (no if unset)
              Supported values: no, yes, auto

              This option specifies if Tidy should add some extra empty lines for readability.

              The default is no.

              If set to auto Tidy will eliminate nearly all newline characters.

       --wrap Integer (68 if unset)
              This option specifies the right margin Tidy uses for line wrapping.

              Tidy tries to wrap lines so that they do not exceed this length.

              Set wrap to 0 (zero) if you want to disable line wrapping.

       --wrap-asp Boolean (yes if unset)
              This option specifies if Tidy should line wrap text contained within ASP pseudo
              elements, which look like: <% ... %>.

       --wrap-attributes Boolean (no if unset)
              This option specifies if Tidy should line-wrap attribute values, meaning that if
              the value of an attribute causes a line to exceed the width specified by wrap, Tidy
              will add one or more line breaks to the value, causing it to be wrapped into
              multiple lines.

              Note that this option can be set independently of wrap-script-literals. By default
              Tidy replaces any newline or tab with a single space and replaces any sequences of
              whitespace with a single space.

              To force Tidy to preserve the original, literal values of all attributes, and
              ensure that whitespace characters within attribute values are passed through
              unchanged, set literal-attributes to yes.

              See also: --wrap-script-literals, --literal-attributes

       --wrap-jste Boolean (yes if unset)
              This option specifies if Tidy should line wrap text contained within JSTE pseudo
              elements, which look like: <# ... #>.

       --wrap-php Boolean (yes if unset)
              This option specifies if Tidy should line wrap text contained within PHP pseudo
              elements, which look like: <?php ... ?>.

       --wrap-script-literals Boolean (no if unset)
              This option specifies if Tidy should line wrap string literals that appear in
              script attributes.

              Tidy wraps long script string literals by inserting a backslash character before
              the line break.

              See also: --wrap-attributes

       --wrap-sections Boolean (yes if unset)
              This option specifies if Tidy should line wrap text contained within <![ ... ]>
              section tags.

ENVIRONMENT

       HTML_TIDY
              Name of the default configuration file.  This should be an absolute path, since you
              will probably invoke tidy from different directories.  The value of HTML_TIDY will
              be parsed after the compiled-in default (defined with -DTIDY_CONFIG_FILE), but
              before any of the files specified using -config.

       RUNTIME CONFIGURATION FILES
              You can also specify runtime configuration files from which tidy will attempt to
              load a configuration automatically.

              The system runtime configuration file (/etc/tidy.conf), if it exists will be loaded
              and applied first, followed by the user runtime configuration file (~/.tidyrc).
              Subsequent usage of a specific option will override any previous usage.

              Note that if you use the HTML_TIDY environment variable, then the user runtime
              configuration file will not be used. This is a feature, not a bug.

EXIT STATUS

       0      All input files were processed successfully.

       1      There were warnings.

       2      There were errors.

SEE ALSO

       For more information about HTML Tidy:

           http://www.html-tidy.org/

       For more information on HTML:

           HTML: Edition for Web Authors (the latest HTML specification)
           http://dev.w3.org/html5/spec-author-view

           HTML: The Markup Language (an HTML language reference)
           http://dev.w3.org/html5/markup/

       For bug reports and comments:

           https://github.com/htacg/tidy-html5/issues/

       Or send questions and comments to public-htacg@w3.org.

       Validate your HTML documents using the W3C Nu Markup Validator:

           http://validator.w3.org/nu/

AUTHOR

       Tidy was written by Dave Raggett <dsr@w3.org>, and subsequently maintained by a team at
       http://tidy.sourceforge.net/, and now maintained by HTACG (http://www.htacg.org).

       The sources for HTML Tidy are available at https://github.com/htacg/tidy-html5/ under the
       MIT Licence.