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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
BA2 - Extension Details
Date Added: August 02, 2009
File Extension:  .BA2
Description 1: .BA2 file extension is linked with Brother Address Book File. This is the file extension for the address book utilized by Brother faxes and printers. It is basically a speed dial application that is used on multifunction printers like the MFC 9700/9800. Brother is a multinational company that specializes in computer printers, faxes, sewing machines, typewriters and labeling systems.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  utilized by Brother faxes and printers
Common:
Extension: