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.
GTIN Validator
Check format, length and the GS1 modulo-10 check digit.
Open tool →02GTIN Check Digit Calculator
Calculate the final digit for GTIN-8, GTIN-12, GTIN-13 or GTIN-14.
Open tool →03GTIN Normalizer
Validate a GTIN and express it in fixed 14-digit form.
Open tool →04UPC to GTIN Converter
Validate UPC-A / GTIN-12 and produce its 14-digit representation.
Open tool →05EAN 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, catalog 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.
Continue to GS1 Digital Link tools →