A file has an unfamiliar file extension. How do I figure out what kind of file this is?

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Checked.png Checked for technical accuracy --Vivianychen 23:11, 29 April 2011 (UTC))


A file has an unfamiliar file extension. How do I figure out what kind of file this is?


This web site lists a large number of file extensions.

Be aware that there are sometimes several possible sources for a given file extension. For example, a '.doc' file could be a Microsoft Word, Interleaf, Wordperfect, Wordstar or Frame document.

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