GTIN Validator
Validate GTIN-8, GTIN-12, GTIN-13 and GTIN-14 product identifiers. Verifies the check digit locally — no signup, no upload.
Result
Paste a GTIN and press Validate. The detected type, cleaned number and check digit will appear here.
Supported GTIN types
The validator handles every standard GS1 GTIN length with the same mod-10 algorithm.
8-digit EAN-8 for small retail packages.
12-digit UPC-A used in the US and Canada.
13-digit EAN-13 — the global retail standard.
14-digit ITF-14 used on cases, cartons and pallets.
About this GTIN validator
This GTIN validator confirms whether a product identifier is structurally correct using the GS1 mod-10 check digit algorithm. It accepts all four GTIN lengths — GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13) and GTIN-14 (ITF-14) — so you can paste any retail or logistics code without thinking about the format up front.
The check runs entirely in your browser. There's no upload step, no signup and no paid API behind it.
When to use it
- Bulk-checking GTINs before sending a product feed to Amazon, eBay or Shopify.
- Catching mistyped digits in a supplier's spreadsheet before importing it.
- Verifying a GTIN-14 carton code matches the inner GTIN-13 item code (after wrapping).
- Confirming a freshly minted GTIN before issuing it to a printer.
- Debugging why a marketplace listing is being suppressed for an invalid identifier.
How it works
- 1Step 1Paste the GTIN
Type or paste any GTIN-8/12/13/14. Spaces, dashes, underscores and dots are cleaned automatically.
- 2Step 2Auto-detect the type
Length determines whether the code is treated as GTIN-8, GTIN-12, GTIN-13 or GTIN-14.
- 3Step 3Check the check digit
We run the GS1 mod-10 algorithm and compare against the digit you provided.
- 4Step 4See the result
Valid codes show the detected type and cleaned number. Invalid codes show the expected check digit.
- 5Step 5Copy or fix
Copy the cleaned, validated code to the clipboard or apply the suggested fix.
What to avoid
- Validating GTINs that still have spreadsheet apostrophes or thousand-separators attached.
- Assuming a structurally valid GTIN means the product exists — it only means the number is well-formed.
- Treating GTIN-14 cartons and inner GTIN-13 items as interchangeable in feeds.
- Using internal SKU numbers as GTINs — they almost never validate.
- Trusting any code where someone has 'fixed' the check digit by hand without recomputing it.
Tips & tricks
- If validation fails with a one-off check digit, you almost certainly have a typo in the body.
- Use the Check Digit Calculator when you have the first 7/11/12/13 digits and need the missing one.
- For bulk lists, paste each GTIN in turn — batch tooling is on the roadmap.
- A GTIN-13 starting with 0 is the same code as a GTIN-12 (UPC-A) — both are valid.
- GTIN-14 'indicator digits' 1–8 mean inner packs/cases; 9 means variable measure.