qrencode man page

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


qrencode [OPTION]... [STRING]


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.


-h, --help

display help message.


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. (default=auto)

-m NUMBER, --margin=NUMBER

specify the width of margin. (default=4)


specify the DPI of the generated PNG. (default=72)


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)


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.


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


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.


Written by Kentaro Fukuchi.


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 3.4.2