Enter your UPC numbers below (without check digit), one per line. Missing digits will be padded with 0s on the left.
UPC-E Mode
If your list consists
exclusively of 8-digit codes, the toolkit automatically switches to a special
UPC-E mode. Each 8-digit UPC-E will be expanded into its equivalent
11-digit UPC-A format before computing the check digit. To skip UPC-E expansion,
simply add a leading zero to at least one of the lines so the list is no longer
all 8 characters long.
Output: