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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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XEN - Extension Details
Date Added: January 01, 1970
File Extension:  .XEN
Description 1: Guitar Hero III uses the data file with the .XEN extension for both Macs and PCs. These files might contain textures, audio, graphics, video or other types of data that are utilized by games. .XEN files come stored in package format and are usually assigned names in this manner: "(filename)).pak.xen. Aspyr in partnership with the original game developer Activision, published Guitar Hero for PCs.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Mac and Windows: Activision Guitar Hero 3
Common:
Extension: