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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
NFF - Extension Details
Date Added: January 01, 1970
File Extension:  .NFF
Description 1: .NFF is the file extension associated with the generic 3D geometric design format. Short for Neutral File Format, this type of file is based on a kind of "minimal scene description language, the one used in describing the surfaces as well as geometry of objects, viewing angle and lighting placement.
File Type:   Image file
Mode: Binary
Program(s) to Open:  Windows: Sense8 WorldToolkit
Common:
Extension: