Barcode Generator | APIVerve API Tutorial

A Node.js web app for generating barcodes. Create Code128 and Code39 barcodes with customizable options.

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Features

• Generate Code128 barcodes (alphanumeric)
• Generate Code39 barcodes
• Option to show/hide value text
• Download generated barcodes
• Clean, modern web interface
• Built with Express.js

Quick Start

1. Clone this repository

   git clone https://github.com/apiverve/barcode-generator-node-tutorial.git
   cd barcode-generator-node-tutorial

2. Install dependencies

   npm install

3. Add your API key

   Set environment variable or edit server.js:

   export API_KEY=your-api-key-here

4. Start the server

   npm start

5. Open in browser

   Visit http://localhost:3000 and generate barcodes!

Project Structure

barcode-generator-node-tutorial/
├── server.js           # Express server & API endpoint
├── public/
│   └── index.html      # Frontend UI
├── package.json        # Dependencies
├── screenshot.jpg      # Preview image
├── LICENSE             # MIT license
├── .gitignore          # Git ignore rules
└── README.md           # This file

How It Works

1. User enters data to encode
2. User selects barcode type (Code128 or Code39)
3. Frontend sends POST request to /api/generate
4. Server calls the Barcode Generator API
5. API returns image URL
6. Frontend displays barcode with download option

The API Call

const response = await fetch('https://api.apiverve.com/v1/barcodegenerator', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': API_KEY
  },
  body: JSON.stringify({
    data: '1234567890',
    type: 'code128',
    displayValue: true
  })
});

API Reference

Endpoint: POST https://api.apiverve.com/v1/barcodegenerator

Request Body:

Parameter	Type	Required	Description
data	string	Yes	Data to encode
type	string	Yes	Barcode type (code128, code39)
displayValue	boolean	No	Show value below barcode (default: true)

Example Response:

{
  "status": "ok",
  "error": null,
  "data": {
    "imageName": "cc85680f-a1d0-4627-89ff-7d7e53663a2b.png",
    "format": ".png",
    "type": "CODE128",
    "expires": 1766010012598,
    "downloadURL": "https://storage.googleapis.com/apiverve/..."
  }
}

Barcode Types

Type	Characters	Use Case
Code128	All ASCII	General purpose, high density
Code39	A-Z, 0-9, - . $ / + % SPACE	Industrial, government

Use Cases

• Inventory management - Label products with barcodes
• Shipping labels - Generate tracking barcodes
• Asset tracking - Tag equipment and assets
• Library systems - Generate book barcodes
• Event tickets - Create scannable tickets
• ID badges - Add barcodes to ID cards

Customization Ideas

• Add more barcode formats (EAN, UPC, etc.)
• Add batch generation
• Save barcode history
• Add custom colors
• Print directly from browser
• Generate barcodes from spreadsheet

Related APIs

Explore more APIs at APIVerve:

• QR Code Generator - Generate QR codes
• QR Code Reader - Read QR codes
• Invoice Generator - Generate invoices

Free Plan Note

This tutorial works with the free APIVerve plan. Some APIs may have:

• Locked fields: Premium response fields return null on free plans
• Ignored parameters: Some optional parameters require a paid plan

The API response includes a premium object when limitations apply. Upgrade anytime to unlock all features.

License

MIT - see LICENSE

Links

• Get API Key - Sign up free
• APIVerve Marketplace - Browse 300+ APIs
• Barcode Generator API - API details