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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
NETA - Extension Details
Date Added: February 10, 2008
File Extension:  .NETA
Description 1: .NETA is the file extension linked to the binary file format used for faster as well as smaller files. Utilized by the Bayesian network development program software called Netica, this filetype is used for managing various uncertainties that may be encountered in the fields of ecology, engineering, business or medicine.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Norsys Netica
Common:
Extension: