QRENCODE(1) General Commands Manual QRENCODE(1)

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

qrencode [-o FILENAME] [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.

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)
read input data from FILENAME.
specify the size of dot (pixel). (default=3)
specify error correction level from L (lowest) to H (highest). (default=L)
specify the minimum version of the symbol. See SYMBOL VERSIONS for more information. (default=auto)
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)
make structured symbols. Version number must be specified with '-v'.
assume that the input text contains kanji (shift-jis).
encode lower-case alphabet characters in 8-bit mode. (default)
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.
encode in a Micro QR Code. See MICRO QR CODE for more information.
enable run-length encoding for SVG.
use single path to draw modules for SVG.
only useful for SVG output, generates an SVG without the XML tag.
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.
disable automatic version number adjustment. If the input data is too large for the specified version, the program exits with the code of 1.
display the version number and copyrights of the qrencode.
display verbose information to stderr.
input data. If it is not specified, data will be taken from standard input.

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.

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.

encode into a symbol version 1, level L.
read standard input and encode it into a structured-appended symbols in case-insensitive mode.
read input data from bigfile.txt and encode into a symbol version 40, level L.

Written by Kentaro Fukuchi.

Copyright (C) 2006-2018 Kentaro Fukuchi.

Aug. 28, 2020 qrencode 4.1.1