GS1 mod 10 check

Client

GS1 mod 10 check names the algorithm explicitly—distinct from Luhn mod-10 used on IMEI and payment cards. Paste an 8-, 12-, 13-, or 14-digit GTIN to run the published weight pattern.

GS1 mod-10 vs other checksums

IMEI uses Luhn mod-10. GTIN uses GS1 mod-10 from the rightmost check digit. SSCC uses the same GS1 mod-10 family on 18 digits—use the SSCC tool for logistics unit IDs.

Privacy: every comparison runs locally in your tab. Toolcore performs no GS1 registry lookup, product database match, or price scan—checksum math only.
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GTIN‑8, UPC‑A (GTIN‑12), EAN‑13, and logistic GTIN‑14 all end with the same ISO/IEC GS1 modulus‑10 weight‑3 algorithm used by the barcode generator when it pads shortened bodies with a check digit. Alternate lengths map to retailer packaging standards (coupon GTIN‑12, carton GTIN‑14, compact GTIN‑8).

Result

Passes modulus‑10 GS1 rule for GTIN-13 (13 digits).

Common use cases

  • Cross-check label samples against spec documents.
  • Explain GS1 mod-10 vs Luhn when auditing mixed identifier CSVs.

Common mistakes to avoid

  • Applying ISBN hyphen rules to GTIN mod-10

    ISBN display formatting is separate tooling—paste continuous digits for GTIN checksum.

FAQ

Do GTINs use GS1 mod-10 or Luhn?

Retail GTINs use GS1 mod-10 with alternating 3/1 weights—not the Luhn algorithm used on IMEI.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • gtin checksum verifier online
  • ean 13 check digit validate browser
  • upc-a modulus 10 checker locally
  • gtin 14 logistic barcode checksum
  • gs1 digit string validator no lookup

More tools

Related utilities you can open in another tab—mostly client-side.