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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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ZTMP - Extension Details
Date Added: May 03, 2009
File Extension:  .ZTMP
Description 1: File extension .ZTMP is linked to the Steam Zipped HalfLife Map/Mod File. When resources from a Steam game server (like .BSD maps) are downloaded by a Steam client, the resources first undergo compression to save on bandwidth. Associated ZTMP files are stored on the server to avoid recompressing the resources the next time clients request them. Changing the resources requires deleting the associated ZTMP files so the next users are not stuck with the old copy, but instead get the altered resource file. Note: Changed game resource files are not detected by Steam; it automatically recreates ZTMP files.
File Type:   Archive file
Mode: Binary
Program(s) to Open:  Open with Steam Zipped HalfLife Map/Mod File program
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