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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:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
XMB - Extension Details
Date Added: January 01, 1970
File Extension:  .XMB
Description 1: The .XMB extension is attached to files that store data utilized by scenarios within the realtime strategy game known as Age of Empires. .XMB files may feature sounds and level data along with other info. The files are saved in an XML format, often ending with a "*.xml.xmb file extension. Users may ordinarily find XMB files stored under the "C:Program FilesMicrosoft GamesAge of Empires IIIdata folder.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Windows: Microsoft Age of Empires
Common:
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