GTIN Validator — EAN-13 & UPC Check Digit

Enter a GTIN, EAN-13, or UPC barcode to validate check digit, detect type, and see validation message.

—Valid
—Type

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How to use

  1. Enter a GTIN, EAN-13, or UPC barcode number.
  2. See validation status, barcode type, and check digit result.
  3. Fix any check digit errors before printing labels.

Frequently asked questions

What GTIN formats are supported?

GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13), and GTIN-14 with check digit validation.

How is the check digit calculated?

Modulo-10 algorithm: alternating weights of 3 and 1 on digits, sum mod 10, complement to 10.

Can I validate barcodes without check digits?

Enter the full code including check digit. The validator confirms the last digit is correct.

Is my data sent to a server?

No. Validation happens entirely in your browser.

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