GTIN format

Client

GTIN format covers four canonical lengths: GTIN-8 for small items, GTIN-12 (UPC-A) common in North America, GTIN-13 (EAN-13) globally, and GTIN-14 for case and pallet levels. Paste to validate structure—not full company-prefix decode tables.

Length breakdown

GTIN-8: compact consumer items. GTIN-12: 12-digit UPC-A (often zero-padded from 11-digit UPC). GTIN-13: EAN-13 consumer. GTIN-14: logistics unit with packaging indicator digit.

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

  • Document expected layout in vendor onboarding wiki.
  • Spot mis-pasted SKUs in GTIN columns.

Common mistakes to avoid

  • Expecting format validation to reveal product category

    Deep item classification requires trading-partner catalogs beyond public checksum rules.

FAQ

What is the GTIN format?

8, 12, 13, or 14 digits with GS1 mod-10 check digit on the right—leading zeros significant for UPC-A.

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.