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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
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QIP - Extension Details
Date Added: December 02, 2009
File Extension:  .QIP
Description 1: .QIP is the extension tied to the .QIP PDA account settings file. Files with .QIP attached contain user info that include passwords and ICQ numbers for logging into ICQ. A .QIP file is associated with the QIP (Quiet Internet Pager) PDA program developed by Ilgam Zulkorneev. The QIP PDA is a closed source computer application for immediate crossNet communication. QIP makes it possible for users to see who are online and available so they can contact them via realtime text messages coursed through a public server.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Associated application: QIP PDA
Common:
Extension: