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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
RAF - Extension Details
Date Added: March 11, 2008
File Extension:  .RAF
Description 1: Files with the .RAF extension are associated with the Fuji RAW Image File. It involves uncompressed RAW photographs that are taken with a Fuji digital camera, like the highend FinePix model. .RAF files contain unprocessed image data. They also often include .JPG versions of the same images found within the file.
File Type:   Image file
Mode: Binary
Program(s) to Open:  Windows: ACDSee Photo Manager, Adobe Photoshop CS, Fuji HyperUtility Software Macintosh: Adobe Lightroom, Adobe Photoshop CS, Apple Aperture, Fuji HyperUtility Software
Common:
Extension: