Barcode Generator

How it works

To generate a barcode, choose a format above and type a value — a scannable barcode renders instantly in your browser and can be downloaded as a PNG, with nothing ever sent to a server.

Unlike a QR code, a 1D barcode like these encodes its data as a sequence of bar widths rather than a 2D grid, which is why each format has stricter rules about what characters and lengths it can represent. Code 128 is the most flexible of the four here — it can encode any printable ASCII text — which makes it the default choice unless you specifically need one of the retail formats.

EAN-13 and UPC-A are the barcodes printed on almost every retail product; they encode a fixed-length numeric product code (plus a checksum digit the format calculates automatically) and are what a store’s point-of-sale scanner expects. Code 39 is an older, simpler format still common in logistics and ID badges — it supports uppercase letters, digits, and a small set of symbols.

The barcode is rendered directly to a canvas element by a well-tested encoding library running locally in your browser — the same approach as this site’s QR generator, just for a different symbology. Nothing about the value you type is transmitted anywhere.

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