This tool allows you to create a barcode in either 39, 128 or EAN13 format. Format 39 only accepts 0-9, capital A-Z and the following characters: $, %, +, -, . and space. Format 128 is more robust and accepts a wide variety of ASCII characters including upper and lower case letters, numbers, symbols, etc. EAN13 only accepts 12 numbers and automatically includes a checksum number at the end.