Free Barcode Generator

How this calculator works

A barcode generator turns any product code, SKU or serial number into the striped pattern scanners read in a fraction of a second. Pick the format that matches your use case: Code 128 encodes letters and digits for SKUs and serial numbers, EAN-13 and UPC-A are the retail barcodes printed on products sold in stores, Code 39 suits warehouse labels and ID badges, ITF-14 marks shipping cartons, and Codabar is still used by libraries and blood banks. Type your value and the barcode renders instantly, with the human-readable text printed underneath so staff can key it in when a scanner is not handy.

Retail formats carry a check digit, a final number computed from the rest that lets scanners catch misprints. This tool adds it automatically: type the 12 digits of an EAN-13 or the 11 digits of a UPC-A and the correct check digit appears, calculated with the standard GS1 mod-10 algorithm. If you paste a full 13 or 12 digit code, the tool verifies the check digit and warns you when it does not match, which usually means a typo in the number. Downloads come as SVG for crisp print at any size or PNG for documents and listings, and the bar width, height and colors are adjustable for label printers and dark packaging.

The label sheet is the part sellers actually asked for: enter a product name and price, choose how many labels fit your sheet, and print a grid of identical labels, each carrying the barcode above. It works with standard label paper and any home or office printer, no special software needed. Like every tool here, everything runs locally in your browser: nothing you encode is sent to a server, and there is no account, watermark or limit.