What is PDF? What Opens a PDF? File Format List from WhatIs.com

File Extension

PDF File Format

Portable Document file (Adobe Acrobat) (displayable with a Web browser)

PDF stands for Portable Document Format. To view and use the files, you need the free Acrobat Reader, which you can download for free. Once you've downloaded the Reader, it will start automatically whenever you want to look at a PDF file.

PDF files capture all the elements of a printed document as an electronic image that you can view, navigate, print or forward to someone else. PDF files are created using Adobe Acrobat , Acrobat Capture, or similar products. 

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This was last updated in May 2010
Editorial Director Margaret Rouse

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