^XA ^FO10,10 ^GFA,1000,1000,20,...[long hex string]... ^FS ^XZ
A ZPL "file" is essentially a string of ASCII code. When this code is sent to a compatible printer, the printer’s onboard processor interprets the commands to draw lines, generate barcodes, and render text in specific fonts. This makes ZPL labels incredibly lightweight and fast to transmit over a network compared to bulky image files. Key Components of ZPL Code zpl label