About CodeClassify

Free, deterministic tools for the codes that make commerce work.

What this site is

CodeClassify offers free online tools for product and business codes: barcode check digits (GTIN/UPC/EAN), format conversion (UPC↔EAN, ISBN-10↔13), IBAN validation, and classification lookups for NAICS & SIC, the SIC↔NAICS crosswalk and HS customs codes.

Everything is deterministic: the same input always gives the same output, computed with the official public algorithms and public-domain government datasets. No AI guesswork, no black boxes.

Who runs it

CodeClassify is an independent project built and operated from Italy. It is not affiliated with GS1, the U.S. government, the European Union or any standards body.

Contact

Questions, corrections, partnership or press: [email protected]

API early access

We are launching a pay-per-use classification & validation API (first 25 calls per month free). Want early access? Email us and we'll notify you at launch. Details: API page.