Getting a barcode to scan reliably is less about the software and more about respecting a few physical rules.
Start with the quiet zone — the empty margin on each side of the code. Skip it and even a perfect barcode becomes unreadable. Next is module width: the narrowest bar should never fall below your printer’s reliable dot size. Finally, print at the device’s native DPI so bars land on whole pixels.
Our QR & Barcode Generator bakes these defaults in, so most people never have to think about them.