Been meaning to do this for AGES. Finally added a UPC validation tool! I mean, we do UPC validation on the back end for every UPC that tries to enter our system, but we wanted to provide a tool for users, too.
The page linked above allows you to enter a UPC in the on-page form (make sure it’s a 12-digit UPC) and the tool will not only tell you whether the UPC is valid or not but will also show how this was checked by performing the workings before your very eyes!
Also, this page will now be linked site-wide, from every product page, so that when you click on the “UPC-A barcode valid” link below the barcode, like here (check the face on this doggo):
…you will be taken to a page like this, explaining the process:
Pretty cool, huh? Check out the doggo example.