Scan & Generate
Barcode Validator & Lookup
Enter a barcode number to validate its format and check digit. Supports EAN-13, EAN-8, UPC-A, UPC-E, ISBN, and GTIN.
Enter digits only (no spaces or dashes)
Supported Barcode Formats
EAN-13
13-digit European Article Number. The most widely used barcode standard for retail products worldwide.
Example: 5901234123457
EAN-8
8-digit compact version of EAN-13. Used for small products where space is limited.
Example: 96385074
UPC-A
12-digit Universal Product Code. Standard barcode in the United States and Canada.
Example: 042100005264
ISBN-13 / ISBN-10
International Standard Book Number. Used to uniquely identify books and publications.
Example: 9780306406157 or 0306406152
GTIN-14
14-digit Global Trade Item Number. Used for trade items and case codes in logistics.
Example: 10012345678902
UPC-E
6 or 8-digit compressed version of UPC-A. Used on very small packages.
Example: 04252614
How Barcode Check Digits Work
Most barcode formats include a check digit — the last digit in the barcode — that helps verify the barcode was scanned or entered correctly. It's calculated from the other digits using a specific algorithm.
EAN/UPC Check Digit Algorithm
- Starting from the right (excluding the check digit), alternate between multiplying by 3 and 1
- Sum all the products
- The check digit is the number needed to round the sum up to the nearest multiple of 10
For example, for EAN-13 code 5901234123457:
- Multiply alternating digits: 5×1 + 9×3 + 0×1 + 1×3 + 2×1 + 3×3 + 4×1 + 1×3 + 2×1 + 3×3 + 4×1 + 5×3 = 5+27+0+3+2+9+4+3+2+9+4+15 = 83
- Check digit: 10 - (83 mod 10) = 10 - 3 = 7 ✓
Scan Any Barcode with Your Camera
The Scan & Generate app instantly reads all barcode formats, performs product lookups, and keeps a searchable history of everything you've scanned.
▶ Download on Google Play