qrencode man page

qrencode ā€” 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)

-s NUMBER, --size=NUMBER

specify the size of dot (pixel). (default=3)

-l {LMQH}, --level={LMQH}

specify error collectin level from L (lowest) to H (highest). (default=L)

-v NUMBER, --symversion=NUMBER

specify the 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,EPS,SVG,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}
--type={PNG,EPS,SVG,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 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.

cat bigfile.txt | qrencode -S -v 40 -l L -o output.png

encode into a symbol version 40, level L.

Author

Written by Kentaro Fukuchi.

Resources

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

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

Referenced By

gpg-key2latex(1), pass(1).

Oct. 9, 2012 qrencode 3.4.4