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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
SSA - Extension Details
Date Added: January 01, 1970
File Extension:  .SSA
Description 1: .SSA is the extension linked to Sub Station Alpha Subtitle File. It is a subtitle format that the developer Kotus created. The older video subtitle creation freeware program called Sub Station Alpha used .SSA files. A number of current video editing applications still support the SSA file format. Saved in text format, .SSA files allow for viewing in a text editor.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  Windows: Sub Station Alpha, Subtitle Processor, VirtualDub, edit with a text editor
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