Portable Document Format, Adobe's fixed-layout document standard.
| 0x00000000 | 255044462D | %PDF- | '%PDF-' + version |
PDF fixes the exact layout of a page across every device and printer, embedding fonts and vector graphics, which is why it is the standard for contracts, forms and print-ready documents. Files start with '%PDF-' followed by the version.
Have a file that might be PDF? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.