Welcome to FILExt, one of the oldest and most respected compendia on file extensions. Over the past 19 years, FILExt has helped more than 50 million users identify, open, view or convert unknown files.

What is a File Extension?

A file extension is nothing more than the last characters after the period in the name of a file. For a detailed explanation, examples, and a method of setting your system so that it shows file extensions please see this FAQ.

Using FILExt.com

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 above 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.
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Number | Symbol

What Can I Do To Help?

  1. You Know About An Extension
    If you know specific details about a file extension/program that we don't have, please tell us about an extension.
  2. Submit All Registered Extensions on Your Computer
    Windows registers file extensions with programs via a shortcut name in the Windows registry. FILExt has a method for you to submit a complete list of the registered file extensions on your system to FILExt. No personal data is included with this submission and it's a text file so you can examine it before sending it. If interested, please see this FAQ.

Watch FILExt grow.

We currently have 26,024 records in the main database; 51,537 registered filetype records; and, 16,344 records in the Program/MIME type database.