NAME

       qrencode - Encode input data in a QR Code and save as a PNG or EPS image.

SYNOPSIS

       qrencode [OPTION]...  [STRING]

DESCRIPTION

       Libqrencode  is  a  library  for encoding data in a QR Code symbol, a kind of 2D symbology
       that can be scanned by handy terminals such as a mobile phone with CCD. The capacity of QR
       Code is up to 7000 digits or 4000 characters, and has high robustness.

       Qrencode  is  a  utility software using libqrencode to encode string data in a QR Code and
       save as a PNG or EPS image.

OPTIONS

       -h, --help
              display help message.

       -o FILENAME, --output=FILENAME
              write image to FILENAME. If '-' is specified, the result will be output to standard
              output.  If  -S  is  given,  structured  symbols  are  written  to FILENAME-01.png,
              FILENAME-02.png, ... (suffix is removed from FILENAME, if specified)

       -r FILENAME, --read-from=FILENAME
              read input data from FILENAME.

       -s NUMBER, --size=NUMBER
              specify the size of dot (pixel). (default=3)

       -l {LMQH}, --level={LMQH}
              specify error correction level from L (lowest) to H (highest). (default=L)

       -v NUMBER, --symversion=NUMBER
              specify  the  minimum  version  of  the  symbol.  See  SYMBOL  VERSIONS  for   more
              information. (default=auto)

       -m NUMBER, --margin=NUMBER
              specify the width of margin. (default=4)

       -d NUMBER, --dpi=NUMBER
              specify the DPI of the generated PNG. (default=72)

       -t {PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}
       --type={PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}
              specify the type of the generated image. (default=PNG)

       -S, --structured
              make structured symbols. Version must be specified.

       -k, --kanji
              assume that the input text contains kanji (shift-jis).

       -c, --casesensitive
              encode lower-case alphabet characters in 8-bit mode. (default)

       -i, --ignorecase
              ignore case distinctions and use only upper-case characters.

       -8, --8bit
              encode entire data in 8-bit mode. -k, -c and -i will be ignored.

       -M, --micro
              encode in a Micro QR Code. (experimental)

       --foreground=RRGGBB[AA]
       --background=RRGGBB[AA]
              specify  foreground/background  color  in  hexadecimal  notation.  6-digit (RGB) or
              8-digit (RGBA) form are supported.  Color output support available only in PNG, EPS
              and SVG.

       -V, --version
              display the version number and copyrights of the qrencode.

       --verbose
              display verbose information to stderr.

       [STRING]
              input data. If it is not specified, data will be taken from standard input.

SYMBOL VERSIONS

       The  symbol  versions  of  QR Code range from Version 1 to Version 40.  Each version has a
       different module configuration or number of modules, ranging  from  Version  1  (21  x  21
       modules)  up  to  Version  40 (177 x 177 modules).  Each higher version number comprises 4
       additional modules per side by default.   See  http://www.qrcode.com/en/about/version.html
       for a detailed version list.

EXAMPLES

       qrencode -l L -v 1 -o output.png 'Hello, world!'
              encode into a symbol version 1, level L.

       qrencode -iSv 1 --output=output.png
              read  standard  input  and  encode  it  into a structured-appended symbols in case-
              insensitive mode.

       qrencode -S -v 40 -l L -r bigfile.txt -o output.png
              read input data from bigfile.txt and encode into a symbol version 40, level L.

AUTHOR

       Written by Kentaro Fukuchi.

RESOURCES

       Main Web Site: https://fukuchi.org/works/qrencode/

       Source code repository: https://github.com/fukuchi/libqrencode/

COPYRIGHT

       Copyright (C) 2006-2017 Kentaro Fukuchi.