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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
NITF - Extension Details
Date Added: January 01, 1970
File Extension:  .NITF
Description 1: NITF stands for National Imagery Transmission Format file. It is the imaging data format the US government and military use to transmit documents. A single file usually contains a mix of graphics, metadata and text, but multiple layers are also supported. The NITF file format is frequently used in combination with the NSIF (NATO Secondary Imagery Format) format to store and transmit government data.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Graphics Converter Pro, ITT Visual Information Solutions ENVI, XnView Macintosh: XnView
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