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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
YPS - Extension Details
Date Added: July 01, 2009
File Extension:  .YPS
Description 1: File extension .YPS is associated with data files written by the Yahoo! instant messaging application known Yahoo! Messenger. This type of file is used to send backandforth messages online. YPS file format is comparable to Microsofts Live Messenger and AOLs Instant Messenger. Manual opening of .YPS files is discouraged as they are referenced by a particular application.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Mac and Windows: Yahoo! Messenger
Common:
Extension: