soldair/node-qrcode
Node Qrcode
node-qrcode is a JavaScript library and command-line tool for generating scannable QR codes from text or binary data. It functions as both a generator library for Node.js and web browser environments and a standalone command-line interface.
The project supports producing QR codes in multiple formats, including raster images and scalable vector graphics. It can also render barcodes as text representations directly within a terminal for rapid visual verification.
The generator includes capabilities for configuring error correction levels and optimizing data density through various encoding modes. It supports writing output directly to the file system or data streams.
Features
- QR Code Generation - Provides a comprehensive library for generating and rendering scannable QR codes from text and binary data.
- Barcode Generators - Core engine for creating scannable QR codes from text or binary data with multi-mode encoding support.
- JavaScript QR Libraries - Provides a JavaScript library for generating QR codes within Node.js and web browser environments.
- Data Encoding - Converts raw byte arrays or buffers into scannable barcodes without string encoding to prevent data corruption.
- QR Code Rendering - Ships a command line interface for rendering QR codes as image files or terminal text representations.
- Barcode Format Export - Renders barcodes in multiple formats including SVG, PNG, data URIs, and plain text strings.
- CLI Barcode Generation - Provides a command-line utility to generate barcode files based on the specified file extension.
- CLI Barcode Rendering - Produces barcode images or terminal text representations for rapid visual verification via CLI.
- Mode-Based Size Optimization - Reduces QR code size by automatically selecting the most efficient encoding modes for different text segments.
- Vector Graphics Formats - Supports producing QR codes in scalable vector graphics (SVG) for high-resolution printing.
- Command Line Utilities - Offers terminal-based tools for generating and rendering QR codes for quick testing and automation.
- Barcode Encoding Modes - Optimizes data density by switching between numeric, alphanumeric, byte, and kanji encoding modes based on input.
- Barcode Redundancy Levels - Provides mechanisms for setting data redundancy levels to maintain barcode scanability.
- Barcode Redundancy Patterns - Implements error correction levels that allow barcodes to remain scannable even when damaged or obscured.
- Terminal Text Rendering - Maps barcode modules to character patterns for visual display within a command line interface.
- Dynamic Image Generation - Produces QR code images in various formats like SVG or PNG for on-the-fly embedding into websites.
- Image Processing - Generates QR codes and barcodes.
