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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
JA - Extension Details
Date Added: May 09, 2008
File Extension:  .JA
Description 1: .JA file extension is linked with Japanese language translation file. This file extension is sometimes used by various applications and programs as their Japanese language translation provider/file. Japanese language translation often utilizes simple XML or text structure/s. The file may open directly or automatically adjusts the settings as per user's preference.
File Type:   Text File
Mode: ASCII
Program(s) to Open:  Windows & Mac: various programs and applications
Common:
Extension: