Print Unicode-friendly QR codes straight in your terminal.

$ make

• libqrencode

  Resolve on Ubuntu or Debian

  $ apt-get install libqrencode-dev
  

  Resolve on macOS

  $ brew install qrencode
  

  Build from source

  $ git clone https://github.com/fukuchi/libqrencode.git && cd libqrencode
  $ ./configure --prefix=/usr/local
  $ make
  # make install
  

# make install

or

$ sudo PREFIX=/usr/local make install

$ qr "Hello"

or

$ echo -n "Hello" | qr

Usage: qr [OPTIONS] STRING
  or:  cat FILE | qr [OPTIONS]

Options:
  -m  QR mode       [na8k] (n = number, a = alphabet, 8 = 8-bit, k = Kanji)
  -v  QR version    [1-40]
  -e  QR EC level   [lmqh] or [1-4]
  -l  use two characters per block
  -s  use 4 blocks per character
  -b  border width  [1-10] (the default is 2)
  -i  invert colors
  -p  force colorless output
  -h  print help (this message)

# make uninstall

$ make test

• autoconf

  Resolve on Ubuntu or Debian

  $ apt-get install autoconf
  

  Resolve on macOS

  $ brew install autoconf
  

• zbar

  Resolve on Ubuntu or Debian

  $ apt-get install zbar-tools
  

  Resolve on macOS

  $ brew install zbar
  

• imagemagick

  Resolve on Ubuntu or Debian

  $ apt-get install imagemagick
  

  Resolve on macOS

  $ brew install imagemagick
  

• FreeMono font

  Resolve on Ubuntu or Debian

  $ apt-get install fonts-freefont-ttf
  

  Resolve on macOS

  $ brew tap homebrew/cask-fonts
  $ brew cask install font-freesans
  

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

The Unlicense