elcome to DotWhat.net, a site dedicated to providing you with detailed file extension information. This site is based on a huge database of file extension information, mainly (but not exclusive to) the Microsoft Windows, MAC OS X and Unix based operating systems.

To continue, please select the first character of the extension from the index below, or simply use the search function in the top-right corner above.

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Edit an extension or simply leave a comment!

We try to provide as much information as possible for each entry, and we encourage all visitors to contact us if they have any additional information, or have a new file extension that they would like added to the database. Alternativly, each entry can be edited and visitors have the option of adding a comment, question or tip!

As Dot What!? is a resource site, we regret that we are unable to provide personal support. However, if you have a problem or any further questions we strongly recommend leaving a message by using comment box at the bottom of every file extension page.

By listening to our visitor's feedback, we've designed this site to be as easy to use as possible and to provide the level of detail and information our visitors require. If you have any suggestions or feedback for this site, please do not hesitate to contact us.

Thanks for visiting!