PDF417 Barcode Generator

PDF417 is a stacked linear barcode, meaning it is built from several rows of bars stacked one above another rather than a single line or a square grid. Each row holds a sequence of codewords, and a codeword is a small pattern of bars and spaces that encodes a value. The name itself describes the structure: PDF stands for Portable Data File, and 417 refers to the building block of the symbol, where each pattern spans 4 bars and 4 spaces across a fixed module width, for 17 units in total. Start and stop patterns frame each row so a scanner can track the boundaries, and row indicators let the reader reassemble the data even if it scans the rows out of order. This design lets PDF417 carry far more information than a one-dimensional barcode while still being read by a laser scanner sweeping across it. This tool encodes your text into a standard PDF417 symbol and exports PNG or SVG. For square 2D formats see the Data Matrix Generator or the QR Code Generator.

PDF417 is one of the highest-capacity barcode formats, able to store up to roughly 1,800 ASCII characters, or around 1,100 bytes, in a single symbol. That capacity is what makes it suitable for documents that must carry a full record rather than just a reference number. Reliability is managed through nine selectable error correction levels, numbered 0 to 8. Each higher level adds more Reed-Solomon recovery codewords, so a damaged or partially obscured symbol can still be read, at the cost of a physically larger barcode. Level 0 offers only error detection, while the higher levels trade size for resilience, and a common practice is to scale the level to the expected handling and print quality. Because the data and the correction overhead share the symbol, raising the level for a fixed payload makes the barcode taller or wider. This tool lets you balance payload against robustness so the symbol stays scannable in its intended use without growing larger than necessary.

PDF417 appears on documents you handle regularly, often without noticing. The barcode on the back of many government-issued identity cards, including most United States driver licenses, is PDF417, encoding the holder's details in a single mark so an officer or kiosk can read the full record from one scan. Airline boarding passes use it to carry the passenger name, flight, seat, and routing, which is why a gate scanner can validate a printed or screen-displayed pass instantly. Shipping and logistics waybills rely on it to hold consignment data, and event tickets use it to store validation information that does not depend on a network lookup. The common thread is the need to embed a substantial, self-contained data set that travels with the document itself. Because the data is on the page, these systems keep working even when offline. This tool generates the same standard symbology those workflows use, so you can prototype an ID layout, a ticket, or a label that mirrors real-world formats.

A few choices decide whether your PDF417 symbol scans cleanly. Module size is the width of the narrowest bar, and printing it too small for the target scanner is the usual cause of failed reads, so use the scale control to keep the modules comfortably above your reader's resolution. Aspect ratio matters because PDF417 is a stacked format: the encoder arranges the data across a number of rows and columns, and a very long, thin symbol can be awkward to scan while a more balanced shape reads better. Match the error correction level to the conditions, since a clean printed ticket needs less recovery than a card that will be handled for years. Keep a clear quiet zone around the whole block and print against a high-contrast background. Most laser and imaging scanners that handle retail barcodes also read PDF417, but confirm your target devices support it before committing a layout. Export SVG for sharp scaling inside a document template, or PNG for a fixed raster image.

PDF417, QR codes, and Data Matrix all store more than a one-dimensional barcode, but they suit different jobs. PDF417 is a stacked format with the largest practical text capacity of the three, which is why it sits on IDs, boarding passes, and waybills that must carry a whole record on the page. QR codes are square matrix symbols built for fast scanning by consumer phone cameras, making them the default for marketing, ticketing, and payments. Data Matrix is also square but optimized for the smallest possible footprint, dominating industrial part marking where space is tight. PDF417 can be read by laser scanners sweeping horizontally, while QR and Data Matrix need imaging readers. If your priority is encoding a large block of text that a controlled scanner will read, PDF417 is the natural choice. For phone reach pick the QR Code Generator, and for tiny durable marks pick the Data Matrix Generator. The general Barcode Generator lets you compare formats side by side.