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Read a product barcode and see whether the last digit matches the GS1 arithmetic. This does not ask a product database and does not prove the number is yours.
Use it at the shelf before you reprint a label. If the printed digits and the scan disagree, trust neither until you scan a second copy.
How to use this tool
- Scan the product barcode.
- Read the number and the check result.
- Compare it with the digits under the bars.
Practical guidance
Use it at the shelf before you reprint a label. If the printed digits and the scan disagree, trust neither until you scan a second copy.
Checks before you use the output
UPC-A is 12 digits. EAN-13 is 13. EAN-8 is 8. A matching check digit is only arithmetic.
Questions and answers
Does a pass mean the product is registered?
No. It means the last digit fits the number in front of it.
Can I scan a Code 128 shelf label?
Use the barcode scanner. This checker is for EAN and UPC.
What about a 14-digit carton code?
GTIN-14 is included when the symbol contains 14 digits.