MacでQRコードを生成するコマンドラインツールqrencode(2026.1.4)

Summary
MacでQRコードを生成するにはコマンドラインツールqrencodeを使う。

qrencodeをインストールする

brewを使ってインストールする

$ brew install qrencode

使い方は簡単

URL等の文字列を指定してpngファイルとして出力する

qrencode -o filename.png "URL string"

man表示は以下の通り

QRENCODE(1)                 General Commands Manual                QRENCODE(1)

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

SYNOPSIS
       qrencode [-o FILENAME] [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)

       -r FILENAME, --read-from=FILENAME
              read input data from FILENAME.

       -s NUMBER, --size=NUMBER
              specify the size of dot (pixel). (default=3)

       -l {LMQH}, --level={LMQH}
              specify error correction level from L (lowest) to H (highest).
              (default=L)

       -v NUMBER, --symversion=NUMBER
              specify the minimum 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,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}
       --type={PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}
              specify the type of the generated image. (default=PNG)

       -S, --structured
              make structured symbols. Version number must be specified with
              '-v'.

       -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       
       
       -8, --8bit
              encode entire data in 8-bit mode. -k, -c and -i will be ignored.

       -M, --micro
              encode in a Micro QR Code. See MICRO QR CODE for more
              information.

       --rle  enable run-length encoding for SVG.

       --svg-path
              use single path to draw modules for SVG.

       --inline
              only useful for SVG output, generates an SVG without the XML
              tag.

       --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, EPS and SVG.
              
       --strict-version
              disable automatic version number adjustment. If the input data
              is too large for the specified version, the program exits with
              the code of 1.

       -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.
       
MICRO QR CODE
       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.


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.

       qrencode -S -v 40 -l L -r bigfile.txt -o output.png
              read input data from bigfile.txt and encode into a symbol version 40, level L.


AUTHOR
       Written by Kentaro Fukuchi.


RESOURCES
       Main Web Site: https://fukuchi.org/works/qrencode/

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


COPYRIGHT
       Copyright (C) 2006-2018 Kentaro Fukuchi.

qrencode 4.1.1                   Aug. 28, 2020                     QRENCODE(1)

参考

• 【Mac】コマンドでQRコードを生成する方法

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