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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
SAF - Extension Details
Date Added: January 01, 1970
File Extension:  .SAF
Description 1: .SAF is the file extension attached to Secure Audio files. It refers to the audio format protected by a copyright that was developed by the firm InterTrust. The format using the .SAF file extension incorporates digital rights management or DRM and is most commonly used to download purchased MusicMatch Jukebox music.
File Type:   Audio file
Mode: Binary
Program(s) to Open:  Windows: MusicMatch Jukebox
Common:
Extension: