Barcode Generator
Generate Code 128, EAN-13, EAN-8, UPC-A and Code 39 barcodes with live validation and automatic check digits, downloadable as SVG or PNG.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
Need a scannable barcode for a product label, a warehouse bin, a book cover or an internal asset tag? This generator builds real barcodes from the official encoding tables of five symbologies — Code 128, EAN-13, EAN-8, UPC-A and Code 39 — entirely in your browser, with nothing uploaded to any server.
The tool validates your input live as you type: it checks the allowed characters and length for the selected format, and for the retail formats (EAN-13, EAN-8, UPC-A) it verifies the check digit. Enter the payload without the check digit and the generator computes and appends it automatically, explicitly telling you which digit it added — so a mistyped code never reaches the printer.
Output is vector-first: bars are drawn as SVG rectangles with correct guard patterns, quiet zones and human-readable digits underneath, so the code stays sharp at any print size. A high-resolution PNG export is available for documents, spreadsheets and mockups where raster images are easier to paste.
Barcodes cover linear one-dimensional codes; if you want to encode a link, Wi-Fi credentials or free text for smartphones to scan, use our QR code generator instead — it lives right next to this tool.
Example. The twelve digits 400638133393 in EAN-13 are completed with check digit 1, so the symbol encodes 4006381333931.
Limit. EAN-13, EAN-8 and UPC-A accept only digits of the GTIN length, and a wrong final check digit is refused.