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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
V - Extension Details
Date Added: February 09, 2008
File Extension:  .V
Description 1: The .V file extension helps identify consistency check support files that the code generator ReaGeniX uses. It is one of the three files that come from a split PPM file, .U and .Y are the two others. YUV is the representation that Stanford MPEG codec employs. In order to access files with the .V extension, a user must install the ReaGeniX program.
File Type:   Image file
Mode: Binary
Program(s) to Open:  Windows: Apple QuickTime Player with QuickTime YUV codec, Windows Media Player with YUV Genius package Macintosh: Apple QuickTime Player with QuickTime YUV codec
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