UPC-A and GTIN-12
A UPC-A symbol encodes a 12-digit identifier that belongs to the GTIN family. This converter validates those 12 digits, including the final check digit, before showing the equivalent fixed 14-digit representation.
Example
036000291452 → 00036000291452Two leading filler zeroes express the same GTIN-12 in a 14-digit field.What changes in the conversion
Only the representation changes. The original GTIN-12 is not replaced or reassigned. Leading zeroes allow systems with fixed-width GTIN fields to carry the same identifier consistently.
Scope
The result confirms format and check-digit structure. It does not identify the brand owner, product description or licensing status, and it is not a barcode image quality test.
Frequently asked questions
Is a UPC-A the same as a GTIN?
UPC-A is a barcode symbology that commonly encodes a GTIN-12. The symbol and the identifier are related but not interchangeable terms.
Can a UPC be 14 digits?
No. UPC-A carries 12 digits. Some systems represent the same GTIN-12 in a 14-digit field by adding two leading filler zeroes; that is a 14-digit GTIN representation, not a 14-digit UPC-A.
Does this tool expand UPC-E?
No. Version 1 deliberately supports UPC-A / GTIN-12 only and does not advertise untested UPC-E expansion.
Standards references
Use these primary GS1 sources for implementation requirements beyond this browser-based utility.