Professional PDF417 Barcode Generator
PDF417 is the long, stacked code you have almost certainly carried in your wallet. The name stands for Portable Data File, and the format is built to hold a lot of information on its own, without needing a database to look anything up.
Where it shows up
Turn over a US driver's license or state ID and the dense rectangle on the back is PDF417, encoding the holder's details directly. You will also find it on airline boarding passes and on shipping labels from carriers like FedEx — anywhere the scan has to work even when the network does not.