EAN-8 is an international barcode type used for universally identifiable products. It is only used when there isn't enough space on the packaging for an EAN-13 barcode. An EAN-8 encodes a GTIN-8 (8 digit Global Trade Item Number).

EAN-13 is the most common barcode type used internationally for universally identifiable products. An EAN-13 encodes a GTIN-13 (13 digit Global Trade Item Number). EAN-13 type barcodes are an extension of UPC-As, which encode an extra digit allowing them to be used internationally.

UPC-A is the most common barcode type used in the USA and Canada for universally identifiable products. A UPC-A encodes a GTIN-12 (12 digit Global Trade Item Number).

UPC-E encodes a GTIN-12, like UPC-A, but creates a barcode suitable for smaller packages by compressing the 12 digit number into a six digit code to reduce the number of bars needed.

Note: Not all GTIN-12's can be encoded as UPC-E barcodes. The barcode preview will show "Invalid barcode data" when this is the case.