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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
FEEDMS - Extension Details
Date Added: January 02, 2009
File Extension:  .FEEDMS
Description 1: .FEEDMS file extension is linked with Microsoft RSS Feed Store File. It is file extension for the RSS feed store file utilized by Microsoft. It was added last 2006 as part of the new Internet Explorer release with an integrated RSS. Internet Explorer 7 is the default client. Microsoft Internet Explorer is a widelyused internet browser. It provides users with enhanced navigation via tabbed browsing, advanced printing, web search via toolbar, easy discovery, reading and subscriptions to RSS feeds and many others.
File Type:   Internetrelated Fle
Mode: Binary
Program(s) to Open:  Windows, Mac & Linux: Microsoft Internet Explorer
Common:
Extension: