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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
SCR - Extension Details
Date Added: March 11, 2008
File Extension:  .SCR
Description 1: Screensavers refer to executable files that run when they are opened. Such files are capable of displaying text or vector graphic animations, and play videos, slideshows and animation. An .SCR file is a Windows screensaver file commonly found in the main directory of Windows. This type of file may launch automatically each time a computer system becomes inactive for about several minutes. The Screen Saver control panel can be used to configure custom settings..SCR files may feature sound effects.
File Type:   System file
Mode: Binary
Program(s) to Open:  Windows: used by the system, adds screensaver options to the Displays control panel
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