EAN-13 barcode validator

The gs1 retail product barcode (worldwide). Validation runs entirely on the check-digit algorithm: mod-10 with alternating weights 1 and 3. No external registry is queried, so there is no rate limit and no per-lookup fee.

Result appears here.

What the API returns

GET /v1/identity/validate?type=ean13&value=4006381333931

{
  "type": "ean13",
  "valid": true,
  "formatted": "4006381333931",
  "details": { ... }
}

Important limitation, stated plainly

A checksum proves the number is well-formed. It does not prove the number was ever issued, nor that it belongs to the person presenting it. Any vendor claiming otherwise from a checksum alone is overselling. Use this to reject the ~90% of bad input that is simply mistyped, then use an official registry for the rest.