Barcode Checker
Paste a UPC, EAN or GTIN to see whether it is correctly formed. The tool checks the length and check digit, tells you the format, and fixes the last digit if it is wrong.
How it works
- 1Enter the full barcode number, including its last digit.
- 2See whether it is valid, and which format it is.
- 3If the check digit is wrong, copy the corrected number.
What a valid GTIN means
GTIN is the umbrella name for the numbers on retail barcodes. UPC-A is a GTIN-12, EAN-13 a GTIN-13, EAN-8 a GTIN-8 and the carton code ITF-14 a GTIN-14. All use the same check digit rule, which is why one tool can check them all.
Fixing a number that fails
If the check digit is wrong, either a digit was mistyped or the last digit was invented. The result shows what the final digit should be. Check against the source before relying on it.