file2qr is a command-line utility written in Go that converts files to QR codes.

• Convert any file (text or binary) to a QR code
• Read from files or standard input (stdin)
• Output to PNG files or display directly in the terminal
• Support for Base64 encoding of binary data
• Configurable QR code size and error correction level
• Follows standard Unix/Linux command-line interface conventions
• Licensed under GNU GPL v3

• Go 1.16 or newer

# Clone the repository
git clone https://github.com/username/file2qr.git
cd file2qr

# Install dependencies
go get -u github.com/skip2/go-qrcode

# Build the application
go build -o file2qr

# Optional: Install system-wide
sudo cp file2qr /usr/local/bin/
sudo cp file2qr.1 /usr/local/share/man/man1/

file2qr [OPTIONS] [FILE]

If FILE is not specified, file2qr reads from standard input.

• -o, --output FILE : Write QR code to FILE (PNG format)
• -s, --size PIXELS : Set QR code image size in pixels (default: 256)
• -r, --recovery LEVEL : Set error correction level (low, medium, high, highest)
• -t, --term-size SIZE : Size of QR code in terminal (default: 40)
• -b, --base64 : Encode content using Base64 (recommended for binary files)
• -h, --help : Display help message
• -v, --version : Display version information

Display a QR code for a text file in the terminal:

file2qr message.txt

Generate a QR code PNG for a binary file:

file2qr -b -o archive-qr.png archive.zip

Use in a pipeline (stdin):

cat config.json | file2qr

Use different error correction level:

file2qr -r high -o secure-qr.png passwords.txt

To display QR codes in the terminal, you need:

• A terminal with support for 24-bit color (true color)
• A font that includes Unicode block characters

Most modern terminal emulators meet these requirements.

QR codes have inherent capacity limitations:

• Regular text data: approximately 2900 characters maximum
• Binary data with Base64: approximately 2100 bytes maximum

For larger files, consider compression before encoding.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

See LICENSE file for details.

Contributions are welcome! Please feel free to submit a Pull Request.

• go-qrcode - QR code generation library