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    1.0.1 • Public • Published

    barcode generator Build Status

    Generate 1D and 2D barcodes

    Supported 1D types

    Supported 2D types



    npm install barcode


    Set it up and specify your type and options. The following 3 are the only required ones.

    var barcode = require('barcode');
    var code39 = barcode('code39', {
    	data: "it works",
    	width: 400,
    	height: 100,

    Next choose from the three methods below how you want to output your barcode.


    Get a stream of the final image data. you can collect this and save out a new PNG (default type), pipe it elsewhere, or save it to a CDN.

    code39.getStream(function (err, readStream) {
    	if (err) throw err;
    	// 'readStream' is an instance of ReadableStream

    File to disk

    Save an image out to the file system, pretty simple. Just be sure to specify your outfile.

    var outfile = path.join(__dirname, 'imgs', 'mycode.png')
    code39.saveImage(outfile, function (err) {
    	if (err) throw err;
    	console.log('File has been written!');

    Base64 encoded img src

    Often times, barcodes are single use for a single print or whatever. With this method, we can create one on the fly and just send the base64 encoded image to the browser through the HTML.

    code39.getBase64(function (err, imgsrc) {
    	if (err) throw err;
    	// if we're using HTTP or another framework
    	res.end('<img src="' + imgsrc + '">');


    Much of the underlying code for the generation is being rewritten, however the API will remain the same. As a rule, anything new will have to be testable.

    Things todo:

    • Move all checksums and ECC to a module in lib/utils
    • Use the new barcode generation class: Barcode2D.js
    • Remove uses of Barcode1D and in-place image generation
    • Create separate functions for generating sequences

    In the future:

    • Abstract drawing to be able to draw with gm or output html (bars with css or canvas)


    The MIT License (MIT)


    npm i @gigasource/barcode-canvaskit

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