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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
EFV - Extension Details
Date Added: January 01, 1970
File Extension:  .EFV
Description 1: .EFV file extension is linked with Ensoniq VFXSD File. This audio file format is utilized by Ensoniq VFXSF digital workstation synthesizer. .EFS file extension is also associated with Awave Studio by FMJSoftware a multipurpose audio/sound tool which reads audiocarrying file formats from various platforms, trackers, synthesizers, mobile phones and others.
File Type:   Audio and Music File
Mode: Binary
Program(s) to Open:  Windows & Mac: Chicken Systems Translator
Common:
Extension: