qrencode
Encode text into QR code images
TLDR
SYNOPSIS
qrencode [options] [string]
DESCRIPTION
qrencode is a command-line QR code generator built on the libqrencode library. It encodes text into QR codes and outputs them in multiple formats including PNG, SVG, EPS, ANSI terminal art, and ASCII, making it suitable for both display and print use cases.Options control the error correction level (L/M/Q/H), QR version (which determines capacity and physical size), and module size for raster output. Input can come from command-line arguments or standard input, supporting integration into scripts and pipelines.
PARAMETERS
STRING
Text to encode. If omitted, reads from stdin.-o FILE, --output=FILE
Output file. Use "-" for stdout.-t TYPE, --type=TYPE
Output type: PNG, PNG32, SVG, EPS, XPM, ANSI, ANSI256, ASCII, ASCIIi, UTF8, UTF8i, ANSIUTF8, ANSIUTF8i, ANSI256UTF8.-s NUMBER, --size=NUMBER
Module (dot) size in pixels (default: 3).-l {L|M|Q|H}, --level={L|M|Q|H}
Error correction level from L (lowest) to H (highest). Default: L.-v NUMBER, --symversion=NUMBER
Minimum QR symbol version (default: auto).-m NUMBER, --margin=NUMBER
Margin width in modules (default: 4).-d NUMBER, --dpi=NUMBER
DPI for PNG output (default: 72).-r FILE, --read-from=FILE
Read input data from file.-8, --8bit
Encode entire data in 8-bit mode.-M, --micro
Encode as Micro QR Code.-i, --ignorecase
Ignore case and use only uppercase characters.--foreground=RRGGBB[AA]
Set foreground color in hexadecimal.--background=RRGGBB[AA]
Set background color in hexadecimal.--svg-path
Use single path to draw modules in SVG.--inline
Generate SVG without the XML declaration.--strict-version
Disable automatic version adjustment.-V, --version
Display version number.
CAVEATS
Maximum data capacity depends on QR version and error correction level. Higher error correction reduces capacity. Binary data may need -8 flag for 8-bit mode.
HISTORY
qrencode was written by Kentaro Fukuchi and is built on the libqrencode library. It provides command-line QR code generation in various output formats.
