⚠️ DEPRECATED: code-generator-lib

🛑 IMPORTANT: This package has been renamed and moved to code-generator-library. Please update your dependencies to use the new package.

npm uninstall code-generator-lib
npm install code-generator-library

This repository and npm package are no longer maintained.

A zero-dependency, incredibly lightweight npm library for generating QR Codes and Code 128 Barcodes.

Because this library is 100% dependency-free, it is exceptionally fast, small, and works universally in both Node.js and the Browser out of the box! It generates pure SVG strings or Base64 Data URIs.

Installation

npm install code-generator-lib

Usage

You can import the library using ES Modules (import) or CommonJS (require).

Generating QR Codes

Generate QR codes easily and get the output as a Base64 SVG Data URI (perfect for <img> tags) or a pure SVG string.

import { generateQR } from 'code-generator-lib';

async function main() {
  // 1. Generate as a Data URI (Base64 SVG - Default)
  const qrDataUri = await generateQR('https://example.com');
  // Result: data:image/svg+xml;base64,PHN2ZyB4bWxucz0...

  // 2. Generate as a pure SVG string
  const qrSvg = await generateQR('https://example.com', { type: 'svg', margin: 2 });
  // Result: <svg xmlns="http://www.w3.org/2000/svg" ...></svg>
}

Generating Barcodes

Generate Code 128 (Set B) barcodes.

import { generateBarcode } from 'code-generator-lib';

async function main() {
  // 1. Generate as a Data URI (Base64 SVG)
  const barcodeDataUri = await generateBarcode('HELLO WORLD');
  // Result: data:image/svg+xml;base64,PHN2ZyB4bWxucz0...

  // 2. Generate as a pure SVG string
  const barcodeSvg = await generateBarcode('1234567890', { 
    type: 'svg',
    height: 60,
    scale: 3
  });
}

API Options

generateQR(text, options)

• text (string): The string/URL to encode.
• options (object):
  • type ('dataUrl' | 'svg'): Output format. (Default: 'dataUrl')
  • width (number): Pixel width/height of the QR code. (Default: 200)
  • margin (number): Margin blocks around the code. (Default: 4)
  • errorCorrectionLevel ('L' | 'M' | 'Q' | 'H'): EC Level. (Default: 'M')
  • color: Object defining dark and light hex colors (Default: { dark: '#000000', light: '#ffffff' }).

generateBarcode(text, options)

• text (string): The string to encode (ASCII 32-127).
• options (object):
  • type ('dataUrl' | 'svg'): Output format. (Default: 'dataUrl')
  • height (number): Bar height in pixels. (Default: 50)
  • scale (number): Barcode width scaling factor. (Default: 2)