What this GTIN validator reviews
Paste nothing into a remote form: upload your catalog locally and validate GTIN-family values across every product row. Findings include the value found, why it matters and a recommended next action.
- GTIN-8, GTIN-12, GTIN-13 and GTIN-14 length
- Numeric format and GS1 check-digit calculation
- Missing, placeholder and duplicate values
Scope and regulatory boundary
A mathematically valid check digit confirms internal identifier structure; it does not prove that a code was licensed, assigned to the product, or accepted for a specific shipment. Preserve leading zeros by storing identifiers as text and verify ownership and assignment in authoritative source records.
Catalog data quality, not customs certification
This tool does not certify customs compliance, determine shipment eligibility or guarantee customs clearance. Review actual shipment requirements with the responsible carrier or adviser.
How to use the checker
- Export a CSV or XLSX file with clear column headings.
- Upload it in the browser and confirm the automatic mapping.
- Scan, review every explanation, and correct values only from trusted source records.
- Re-run validation and export a corrected copy for further review.