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

       Written by Kentaro Fukuchi.

       Copyright (C) 2006-2018 Kentaro Fukuchi.

qrencode 4.1.1                                    Aug. 28, 2020                                      QRENCODE(1)

       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.

qrencode-lL-v1-ooutput.png'Hello,world!'
              encode into a symbol version 1, level L.

       qrencode-iSv1--output=output.png
              read standard input and encode it into a structured-appended symbols in case-insensitive mode.

       qrencode-S-v40-lL-rbigfile.txt-ooutput.png
              read input data from bigfile.txt and encode into a symbol version 40, level L.

       With  Micro  QR  Code,  You  can embed data in a smaller area than with QR Code, but the data capacity is
       strongly limited. The symbol versions range from Version 1 to 4.

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

-h,--help
              display help message.

       -oFILENAME,--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)

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

       -sNUMBER,--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)

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

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

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

       -t{PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}--type={PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}
              specify the type of the generated image. (default=PNG)

       -S,--structured
              make structured symbols. Version number must be specified with '-v'.

       -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. See MICRO QR CODE for more information.

       --rle  enable run-length encoding for SVG.

       --svg-path
              use single path to draw modules for SVG.

       --inline
              only useful for SVG output, generates an SVG without the XML tag.

       --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.

       --strict-version
              disable  automatic  version  number  adjustment.  If the input data is too large for the specified
              version, the program exits with the code of 1.

       -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.

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

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

       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.

qrencode [-o FILENAME] [OPTION]...  [STRING]