The EAN-13 barcode has one more country/region code than the UPC-A barcode. In fact, the UPC-A barcode can be regarded as a special case of the EAN-13 barcode, which is the EAN-13 barcode with the first digit set to 0.
The EAN-13 barcode is developed by the International Article Numbering Center and is universally accepted. The code length is 13 digits, and the first two digits represent the country or region code.
UPC-A barcode is produced by the United States Uniform Code Committee and is mainly used in the United States and Canada. The code length is 12 digits, and the first digit indicates the numeric system code.
EAN-13 barcode and UPC-A barcode have the same structure and verification method, and similar appearance.
EAN-13 barcode is a superset of UPC-A barcode and can be compatible with UPC-A barcode.
If I have a UPC code, do I still need to apply for an EAN?
No need. Both UPC and EAN can identify goods. Although the former originated in the United States, it is part of the global GS1 system, so if you register UPC under the GS1 organization, it can be used globally. If you need to print a 13-digit EAN barcode, you can add the number 0 in front of the UPC code.
UPC-A barcodes can be converted to EAN-13 barcodes by prepending 0. For example, the UPC-A barcode  corresponds to the EAN-13 barcode . Doing this ensures Compatibility with UPC-A barcodes.