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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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W3G - Extension Details
Date Added: January 01, 1970
File Extension:  .W3G
Description 1: .W3G is a file extension tied to the Warcraft 3 Replay file. It refers to recordings of Warcraft 3 games. Such files include all activity relating to a particular match or scenario from the start all the way to the end. The .W3G files are automatically saved in the WarCraft III installation folder. Files not saved manually get overwritten the next time a new game is played.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Mac and Windows: Blizzard WarCraft III
Common:
Extension: