File extension

A file extension is nothing more than the last characters after the period in the name of a file.

FILExt is a database of file extensions and the various programs that use them. If you know the file extension you want to learn about simply enter it into the search box on the left and click on the Search button. If it's in any of the FILExt databases the data we have on that file extension will be shown on a results page. If it's not in any of the databases you will be given a link to a page with hints on how to do further research. Don't search on terms; just file extensions and only one at a time please. There will be another search box on the results page if you have multiple searches to do.
It's possible that the search will give you multiple results as there is no central registry for file extensions. If so, you will have some detective work to do; read the results page carefully as there will be hints on how to do this detective work.
Can I Make Coming to FILExt Easier?
Yes. If you find FILExt useful you can come here to the proper search page using a variety of methods...
Come directly from Windows. Use FILExt Direct to change your registry so you come here when you click on a file Windows does not know how to open.
Come via Google Toolbar. Add a button to your Google toolbar so when you highlight a file extension and click on the button you come directly to FILExt with your search.
Come via Firefox Search. Add FILExt to your Firefox search box and come directly via a search box entry.
Use a Google Desktop Gadget. FILExt has a Google Desktop Gadget which allows you to add basic search to your desktop with links to specific pages once you've found what you want.