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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
GIFF - Extension Details
Date Added: January 01, 1970
File Extension:  .GIFF
Description 1: .GIFF file extension is linked with Compuserve Bitmap Image. This it is the CompuServe bitmap image utilized by Graphics Interchange Format or GIF. As with other .GIF files, .GIFF is a common format for Web graphics such as small images and images with texts. .GIFF file extension is also associated with XnView from Pierre Gougelet, IrfanView from Irfan Skiljan and ACDSee 10 Photo Manager from ACD Systems International Inc.
File Type:   Bitmap Image File
Mode: Binary
Program(s) to Open:  Windows: ACDSee Photo Manager, Adobe Photoshop, Adobe Photoshop Elements, Corel Paint Shop Pro, Microsoft Windows Photo Gallery Viewer; Mac: Adobe Photoshop, Adobe Photoshop Elements for Mac, Apple Preview or Safari, Nuance OmniPage Pro X, other picture viewer or web browser; Unix: The GIMP
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