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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
GADGET - Extension Details
Date Added: February 10, 2008
File Extension:  .GADGET
Description 1: .GADGET file extension is linked with Windows Sidebar Gadget File. A Windows Gadget is a small application which runs within the Vista [OS] sidebar. Vista Gadgets may include search tools, news feeds, small games, system utilities an others. There are other gadgets available in Windows Vista such as SideShow [can run on digital photo frames, mobile phones and other devices] and Web [can be located on Web pages] gadgets. Vista gadgets can be downloaded from Window Live Gallery, free of charge.
File Type:   System File
Mode: Binary
Program(s) to Open:  Windows: Windows Vista OS
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