Open PDF File

Information, tips and instructions

Frequently Asked Questions

What is PDF File?

PDF which stands for Portable Document Format was created as a rich document format independent on platform it is used on. PDF document is created in a way that its representation adapts to different hardware and software environments it is open on. This and availability of Adobe Acrobat Reader on all popular PC and mobile platforms made PDF de-facto standard for portable documents.

What is the easiest way to open PDF file?

If your computer is unable to open PDF file with embedded operating system tools you need to go to and download Adobe Acrobat Reader for your computer operating system.

Where can I find PDF specification?

PDF ISO 32000-1:2008 specification could be downloaded at

What file extension Portable Document File Format Uses?

Portable Document File Format uses .PDF file extension. If your file doesn't have .PDF file extension but you suspect it is PDF, open it in hex or text editor and check if it starts with %PDF-1. If it is so then this file is probably in Portable Document File Format.

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PDF Quick Info
Portable Document Format
MIME Types
  • application/pdf
  • application/x-pdf
  • text/x-pdf
Identifying Characters
Hex: 25 50 44 46 2D 31 2E 
PDF File Opens with
  • Acrobat Reader
  • Sumatra PDF
  • Foxit Reader

Open PDF File Translations: