Product identifier utilities
GTIN & product ID tools
Validate, calculate and normalize the identifiers used to distinguish trade items. Every calculation runs locally in your browser, with no account required.
Bulk GTIN & CSV Validator
Check up to 1,000 UPC, EAN and GTIN values, find errors and export a CSV report.
Open tool →02GTIN Validator
Check format, length and the GS1 modulo-10 check digit.
Open tool →03GTIN Check Digit Calculator
Calculate the final digit for GTIN-8, GTIN-12, GTIN-13 or GTIN-14.
Open tool →04GTIN Normalizer
Validate a GTIN and express it in fixed 14-digit form.
Open tool →05UPC to GTIN Converter
Validate UPC-A / GTIN-12 and produce its 14-digit representation.
Open tool →06EAN to GTIN Converter
Validate EAN-8 or EAN-13 and produce its GTIN-14 representation.
Open tool →A reliable starting point
Validate before identifiers move downstream
GTIN workflows often begin in spreadsheets, catalogue feeds, packaging files or marketplace listings. A single mistyped digit can prevent a barcode from scanning or a product record from matching correctly.
These utilities focus on structural checks: accepted lengths, numeric content, GS1 modulo-10 check digits and fixed 14-digit representations. They do not prove that an identifier has been licensed or assigned to a specific product.
New to the terminology? Read what a GTIN is, compare UPC versus GTIN, or follow the check-digit calculation guide.
Continue to GS1 Digital Link tools →