Are you a file extension seeker? By the way, there are some basic things we need to understand about file extensions. File extensions are usually three or four letter codes on the end of file names that tell operating system what kind of file they are dealing with.

FileStuff have researched and collected a very large list of the Filename Extensions with detailed explanations of each file type and the way they are used today. The site provides you information on over 5,000 file extensions.

If you come across a file in your computer with an unknown file extension, you can look up the information about desired file extension and its file associations using the site.Simply use the search box for a specific file extension. They have also a complete list of File Extensions. You can also browse software listings A to Z to find specific extensions.