A PDF417 barcode is a two-dimensional (2D) barcode that is made up of a series of stacked barcode symbols. It is a high-capacity barcode that can store a large amount of data in a relatively small space. PDF417 barcodes are used in a variety of applications, including identification documents, transportation tickets, and shipping labels.

The name "PDF417" comes from the fact that the barcode is based on the Portable Data File (PDF) format, which was developed by Adobe Systems. PDF417 barcodes are capable of storing up to 1.1 kilobytes of data, which is significantly more than most other barcode formats. They are also able to encode a wide range of data types, including text, numbers, and binary data.

PDF417 barcodes are read using a barcode scanner or a smartphone with a barcode reader app. They are widely used in various industries and are a common feature on identification documents such as driver's licenses and passports. Minor Decliner reads PDF417 Barcodes on the back of all US drivers licenses