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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
WDGT - Extension Details
Date Added: January 01, 1970
File Extension:  .WDGT
Description 1: . WDGT is a file extension associated with the Dashboard Widget. The WDGT refers to a small program that is termed a "widget. Dashboard in Mac OS X 10.4 or later versions use the .WDGT file format. One of the applications associated with the .WDGT extension is the Mac OS X. Apple, Inc. is the company behind the development of the Mac operating system.
File Type:   System file
Mode: Binary
Program(s) to Open:  Mac OS: Dashboard (Mac OS X 10.4 or later)
Common:
Extension: