Check digit
The last digit per GS1 (modulo 10). If it is wrong, the correct digit is shown.
GTIN/EAN Checker
How the GTIN checker works
- 01
Paste your list
One code per line, straight from Excel or a supplier export. Spaces and hyphens don’t matter.
- 02
Checked instantly
Length, check digit and GS1 prefix are checked in your browser; nothing is uploaded.
- 03
Export the result
Copy the valid codes or download the full result as a CSV for Excel.
Identifiers
What the GTIN checker covers
Formats
GTIN-8, GTIN-12 (UPC), GTIN-13 (EAN) and GTIN-14.
GS1 prefix
Which GS1 organisation issued the code, e.g. GS1 Germany or GS1 Austria, plus ISBN and ISSN.
Unsuitable codes
In-store numbers, coupons and placeholders that don’t belong on marketplaces.
Productbay
Clean identifiers on every import
Productbay brings supplier data, including EAN/GTIN, into one consistent format with AI and gives every channel exactly the fields it requires.
FAQ
FAQ
What is the difference between EAN and GTIN?
GTIN is the umbrella term for GS1’s globally unique trade item numbers. EAN is the older name of the 13-digit version, now called GTIN-13.
Does a valid check digit mean the code is assigned?
No. The check digit only shows the code is well-formed. Whether it is registered for this exact product is known only to its owner or GS1.
Does the prefix say where a product was made?
No. The prefix only shows which national GS1 organisation issued the code.
Are my codes stored?
No. The check runs entirely in your browser.
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