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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
A64 - Extension Details
Date Added: May 09, 2008
File Extension:  .A64
Description 1: .A64 file extension is linked with Nintendo 64 memory export file. A64 file format was developed during the time of emulation programming for N64 console. There is no specific application or program that A64 is assigned to. .A64 text format is utilized by NRage DirectInput8 and The Adaptoid N64 to interface with Personal Computer's driver.
File Type:   Text File
Mode: ASCII
Program(s) to Open:  Windows: NRage DirectInput8, The Adaptoid N64
Common:
Extension: