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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
ACE - Extension Details
Date Added: May 01, 2009
File Extension:  .ACE
Description 1: .ACE file extension is linked with Jupiter Ace Snapshot File. Jupiter Ace was a home micro that was produced during the peak of the home computer boom in the 80s. It was the only home micro that utilized Forth as a standard programming language. Jupiter Ace standard version came with a 3k RAM, where 1k was for the programs, and 8k ROM. It has springy rubber keyboard with smaller keys. The monochrome display was 32x24 and it has 128 characters. An internal buzzer provided the sound, and a 300baud/1500baud tape interface.
File Type:   Backup File
Mode: Binary
Program(s) to Open:  utilized by Jupiter Ace home micro
Common:
Extension: