JLJosh Liljenquist

Browser-local image creation

Barcode Tools

Create downloadable barcode images locally in your browser without uploading the encoded value.

Two focused tools

Create Code 128 or Code 39 symbols for general data, or encode and validate an existing UPC-A number.

Choose a barcode tool

Browser-localBarcode Generator

Create downloadable Code 128 or Code 39 barcode images locally as SVG or PNG.

Browser-localUPC Barcode Generator

Validate or calculate a UPC-A check digit and create a downloadable barcode from a number you provide.

Encoding is not identifier assignment

These tools draw symbols from values you provide. They do not issue product identifiers, register UPCs, or guarantee marketplace acceptance.

Local SVG and PNG

Generate scalable SVG or practical PNG output with black bars, a white background, quiet zones, and optional human-readable text.