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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
JRL - Extension Details
Date Added: January 01, 1970
File Extension:  .JRL
Description 1: .JRL file extension is linked with BioWare Aurora Game Engine Journal File. This is the file extension utilized by BioWare Aurora; where a journal pertains to a control system which determines how game objects should interact with each other in terms of hostile, friendly or neutral reactions. The Faction info is stores in module.jrl file in games module or savegame. .JRL file utilizes BioWares GFF [Generic File Format].
Description 2: .JRL file extension is linked with Top Secret Crypto Gold Top Secret Journal File. This is the file extension utilized by Top Secret Crypto Gold an application which includes email and file encryption; spell checking of emails, journals, chat messages; conducts peertopeer, pctopc and chat encryption via internet. This application also includes data compression and Secret Key Ring Management procedures among others.
File Type:   Encoded and Encrypted File
Mode: ASCII
Program(s) to Open:  Windows: Top Secret Crypto Gold
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