Barcode Checksum Validator
CodeValidate EAN-13, EAN-8, and UPC-A barcode numbers via their weighted mod-10 check digit algorithm
Paste an EAN-13, EAN-8, or UPC-A barcode number and get its check digit verified against the standard weighted mod-10 algorithm those formats share, with the format itself inferred automatically from the digit count. It's useful for sanity-checking a barcode before it goes into a product catalog or inventory system, or for generating valid test barcodes for retail and POS software. The check simply strips spaces and hyphens, confirms the remaining characters are digits, and recomputes the final check digit from the rest, so it works the same way whether the barcode came from a spreadsheet, a scanner, or a manually typed SKU. It doesn't look up what product a barcode actually belongs to, since that would require a paid barcode database and this tool only validates the checksum and format.
How to use Barcode Checksum Validator
- 1.Paste a barcode number to instantly see whether its check digit is valid and which format (EAN-13, EAN-8, or UPC-A) it matches.
- 2.Use it to sanity-check barcode data before importing it into a product catalog or inventory system.
- 3.Generate and verify test barcodes for retail or point-of-sale software without needing real product data.
Frequently asked questions
Use via API, SDK, or MCP
cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/barcode-validator \
-H "Authorization: Bearer utx_live_..." \
-H "Content-Type: application/json" \
-d '{"barcode":"4006381333931"}'Get an API key from your dashboard · Full API docs →