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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
A8 - Extension Details
Date Added: January 01, 1970
File Extension:  .A8
Description 1: .A8 file extension is linked with Alpha Channel Image Data 24bit RGB Cubicomp PictureMaker 3D Animation. Cubicomp PictureMaker took the first step in developing a PCbased professional broadcast 3D animation and modeling system. Cubicomp PictureMaker was owned and produced by PM Source. The company is now named Laurel Systems, Inc.
File Type:   3D Graphics, CADCAM file
Mode: Binary
Program(s) to Open:  Windows & Mac: Cubicomp PictureMaker
Common:
Extension: