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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
FFA - Extension Details
Date Added: February 10, 2008
File Extension:  .FFA
Description 1: .FFA file extension is linked with Find Fast Status File. This file tracks the Find Fast Status. .FFA files are generated by Find Fast Indexer which is a utility in Microsoft Outlook and Office applications. .FFA file is usually named "Ffastun.ffa and it is situated in the indexed hard disks root directory. .FFA file extension and Find Fast are owned and developed by Microsoft Corp.
File Type:   System File
Mode: Binary
Program(s) to Open:  Windows: Microsoft Outlook, Microsoft Office applications
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Extension: