What is PDF417?
PDF417 is a stacked barcode made from multiple rows of linear codewords. It is widely associated with identification documents, transportation, ticketing and applications that need more data than a traditional 1D barcode can hold.
Why PDF417 looks different
Instead of a square matrix, PDF417 is built as a stack of narrow barcode rows. Row indicators and start/stop patterns help a decoder interpret the symbol.
Common applications
PDF417 is widely seen on driver licenses and other identification documents, boarding/transport workflows and forms that need machine-readable data.
Printing considerations
The number of rows, columns and error-correction level influence the symbol shape. Printing must preserve module width and row height.
Practical implementation advice
Barcode artwork that looks correct on screen can still fail after printing. Preserve quiet zones, avoid non-uniform scaling, choose an appropriate X-dimension or module size, and test the final printed symbol with the scanners and software used in the real workflow.