GTIN spreadsheet validator

Client

GTIN spreadsheet validator for PIM and marketplace ops teams exporting barcode columns. Paste for per-row mod-10 without uploading the workbook to a cloud validator.

Excel to validator workflow

Select barcode column, copy, paste into tool. Fix failing rows in source spreadsheet before marketplace or WMS import—cheaper than bulk rejection emails from partners.

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

  • Validate supplier catalog Excel before PIM import.
  • QA marketplace feed GTIN column after VLOOKUP merges.
  • Replace fragile spreadsheet MOD formulas with a bookmarkable tool.

Common mistakes to avoid

  • Scientific notation corrupting leading zeros

    Format Excel column as text before export—012345678905 becomes invalid if truncated.

  • Pasting header row with column title

    Skip 'GTIN' or 'UPC' header line—it fails digit guards.

FAQ

Can I validate a whole Excel column?

Copy column as one GTIN per line—each row runs mod-10 locally.

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.