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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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UMOD - Extension Details
Date Added: March 12, 2008
File Extension:  .UMOD
Description 1: The extension .UMOD is linked to the Unreal Tournament Module file. It is a selfextracting Unreal module installer archive that contains modifications as well as addons for the original first Unreal Tournament 3D multiplayer game. UMOD files contain compressed mod files along with a "Manifest.ini that tells the locations where to install the files. The .UT2MOD extension is used for Unreal 2003 UMOD installers.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Windows: Epic Games Unreal Tournament, create and edit with Umod Wizard or UEDT Macintosh: Epic Games Unreal Tournament
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