GTIN check digit calculator
LabelCraft - barcode labels for Shopify that print at exactly the size you set.
Every label prints at the size you set - measured, not approximate.
Overflow or a missing barcode always raises a visible warning before you print.
Native ZPL puts every bar on whole printer dots. Bars under 2 dots wide, or PDF EAN/UPC bars thinner than the GS1 minimum, raise a warning.
We only write to your barcodes that were empty when we read them, unless you ask us to fix them.
Enter a UPC-A, EAN-13, EAN-8 or GTIN-14 below. This tool recomputes the check digit, tells you whether the code is valid, flags restricted (non-retail) prefixes, and suggests a correction when a digit is wrong.
Check a barcode
8, 12, 13 or 14 digits. Spaces and hyphens are ignored.
Enter a barcode above to check its check digit.
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Learn more
- The GTIN check digit, and why your barcode won't scan without it
- My barcode is invalid - how do I fix the check digit?
- Free barcode generator for Shopify
