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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
WIM - Extension Details
Date Added: January 01, 1970
File Extension:  .WIM
Description 1: The .WIM extension refers to the filebased imaging format that was introduced with Windows Vista. It allows the deployment and setup of one disk image to multiple computer system platforms. In this way, managing files like updates, components and drivers can be done within the file, with no need to boot the system image. WIM images sometimes contain several disk images that users can mount as new volumes within the Windows system. Users can also make these same images bootable, allowing for a computer to boot from the disk images location.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Windows: 7Zip 4.49 or later, Microsoft ImageX
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