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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
GFF - Extension Details
Date Added: January 01, 1970
File Extension:  .GFF
Description 1: .GFF file extension is linked with SignalMap GeneFinding Format Data File. The GeneFinding Format or GFF allows users to develop the features and have them tested minus the need for maintaining a comprehensive featurefinding system. GFF helps those who are developing and applying integrated genefinding applications to test new featuredetectors which were developed by other users or by themselves. GFF is purposely aimed at low common denominators and it was a proposed protocol for feature information transfer.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  utilized by Genefinding systems such as Acedb, Genotator and others
Common:
Extension: