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PDF

PDF

Portable Document Format

PDF (Portable Document Format) is a file format developed by Adobe in 1993 to present documents — including text formatting and images — independently of application software, hardware, and operating systems. It became an open standard (ISO 32000) in 2008. PDFs preserve page layout exactly, which makes them ideal for contracts, reports, forms, and any document where appearance must remain consistent across devices.

File extensions .pdf
MIME type application/pdf
Developer Adobe Systems
First released 1993
Category Documents
Open standard Yes

What opens PDF files

  • Adobe Acrobat / Acrobat Reader
  • Preview (macOS)
  • All modern web browsers
  • Microsoft Edge
  • Foxit Reader

Common conversions

Browse File Formats

Reference details for 53 file formats — extensions, MIME types, what opens each one, and how they convert.