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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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W3Z - Extension Details
Date Added: January 01, 1970
File Extension:  .W3Z
Description 1: The .W3Z extension refers to mission save files that WarCraft III and WarCraft 3 Frozen Throne expansion pack created. W3Z files save a games current progress. In this way, users can load the game and have the option of continuing it sometime later. Multiplayer games like Battle.net matches can likewise be saved, only here users need to load the saved game for the match to resume properly and successfully.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Mac and Windows: Blizzard WarCraft III
Common:
Extension: