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bwip-js

JavaScript barcode generator supporting over 100 types and standards.

  • 4.5.1
  • latest
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  • npm
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Version published
Weekly downloads
125K
decreased by-10.23%
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What is bwip-js?

bwip-js is a comprehensive barcode generation library for Node.js and the browser. It supports over 100 different barcode formats, including linear barcodes, postal barcodes, and 2D barcodes. The library is built on top of the BWIPP (Barcode Writer in Pure PostScript) project, ensuring high-quality and accurate barcode generation.

What are bwip-js's main functionalities?

Generate Linear Barcodes

This feature allows you to generate linear barcodes such as Code 128. The code sample demonstrates how to create a Code 128 barcode with specific text, scaling, height, and text alignment.

const bwipjs = require('bwip-js');
bwipjs.toBuffer({
    bcid: 'code128',       // Barcode type
    text: '0123456789',    // Text to encode
    scale: 3,              // 3x scaling factor
    height: 10,            // Bar height, in millimeters
    includetext: true,     // Show human-readable text
    textxalign: 'center',  // Always good to set this
}, function (err, png) {
    if (err) {
        // `err` may be a string or Error object
        console.log(err);
    } else {
        // `png` is a Buffer
        // png.length
        // png.readUInt32BE(16)
    }
});

Generate 2D Barcodes

This feature allows you to generate 2D barcodes such as QR codes. The code sample demonstrates how to create a QR code with specific text, scaling, version, and text alignment.

const bwipjs = require('bwip-js');
bwipjs.toBuffer({
    bcid: 'qrcode',        // Barcode type
    text: 'https://www.example.com', // Text to encode
    scale: 3,              // 3x scaling factor
    version: 5,            // QR Code version
    includetext: true,     // Show human-readable text
    textxalign: 'center',  // Always good to set this
}, function (err, png) {
    if (err) {
        // `err` may be a string or Error object
        console.log(err);
    } else {
        // `png` is a Buffer
        // png.length
        // png.readUInt32BE(16)
    }
});

Generate Postal Barcodes

This feature allows you to generate postal barcodes such as USPS Intelligent Mail. The code sample demonstrates how to create a USPS Intelligent Mail barcode with specific text, scaling, height, and text alignment.

const bwipjs = require('bwip-js');
bwipjs.toBuffer({
    bcid: 'usps4cb',       // Barcode type
    text: '01234567094987654321', // Text to encode
    scale: 3,              // 3x scaling factor
    height: 10,            // Bar height, in millimeters
    includetext: true,     // Show human-readable text
    textxalign: 'center',  // Always good to set this
}, function (err, png) {
    if (err) {
        // `err` may be a string or Error object
        console.log(err);
    } else {
        // `png` is a Buffer
        // png.length
        // png.readUInt32BE(16)
    }
});

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Package last updated on 13 Aug 2024

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