2018-12-17
The Advent of Void: Day 17: qrencode
qrencode is a command line QR-Code generator.
You can generate a QRCode from an arbitrary string:
$ qrencode -o qrcode.png "QRCode Message"
This will create a new png image containing the QR-Code. You can use feh to display it:
$ feh qrcode.png
If you’re a terminal guy, you might dislike the window popping up. qrencode has you covered there:
$ qrencode -t ansi "QRCode Message"
This will generate a scannable QR-Code directly on the terminal window using
ANSI escape sequences. If you’d like to avoid escape codes qrencode also
supports pure UTF-8 encoding using -t utf8
.
$ qrencode -t utf8 "QRCode Message"
█████████████████████████████
█████████████████████████████
████ ▄▄▄▄▄ █▀▄█▀▄█ ▄▄▄▄▄ ████
████ █ █ █▀▄█▀██ █ █ ████
████ █▄▄▄█ █▀▀ █ █ █▄▄▄█ ████
████▄▄▄▄▄▄▄█▄█ ▀ █▄▄▄▄▄▄▄████
████▄▄ ▄▄▀▄ ▄ ▀▄▄ ▀ █▄▀ █████
████▀██▀▄ ▄▀ ██ ▄ █▀█▀▀ █████
█████▄█▄██▄█ ██▄▄▀▄ ▀█ ▀█████
████ ▄▄▄▄▄ █▄▀█ █▄█ ▀▄▀████
████ █ █ █ █▄█▄▄▄▀▀▀█▄▄████
████ █▄▄▄█ █ ▀ ▄ ▄▀█ ▀██████
████▄▄▄▄▄▄▄█▄▄▄█▄▄▄████▄█████
█████████████████████████████
█████████████████████████████
qrencode supports a rich set of output formats including PNG, SVG, EPS, XPM, and even pure ASCII.
More colors? No problem! You can define custom foreground- and background colors:
$ qrencode -o - "QRCode Message" --foreground=00ff00 --background=0000ff | feh -
For more information please read the qrcode(1) manpage.