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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
ATP - Extension Details
Date Added: January 01, 1970
File Extension:  .ATP
Description 1: .ATP file extension is linked with Sony Music Format File. This file format is DRM copyprotected. .ATP file extension is also associated with WMAConvert Platinum an easytoinstall and easytouse interface that provides users with compression level options and preserves ID3 tags for albums, titles and artists names. It offers draganddrop and batch mode functions for files and folders that allow conversion and unprotect large music collections in one click.
File Type:   Audio and Music File
Mode: Binary
Program(s) to Open:  Windows: WMAConvert Platinum
Common:
Extension: