About Us

What Is A File Extension?

A file extension, or filename extension, is a suffix at the end of a computer file. It comes after the period, and is usually two-four characters long. If you’ve ever opened a document or viewed a picture, you’ve probably noticed these letters at the end of your file.

File extensions are used by the operating system to identify what apps are associated with what file types—in other words, what app opens when you double-click the file. For example, a file named “awesome_image.webp” has the “webp” file extension. When you open that file in Windows, for example, the operating system looks for whatever app is associated with WEBP files, opens that app, and loads the file.

What is the FileLook.net website?

FileLook is a database that stores tens of thousands of file extensions. With each file extension, you can know the structure of the file, the software that can open the file, and a lot of other information.

The file extension information can be searched, sorted and classified very easily using the utilities we provide on this website.

In addition, we provide information on thousands of software related to file extensions.

We always update and supplement data every day to ensure accuracy and completeness. We want to bring the most valuable information to our users.