KEY File - opening and understanding

Did your computer fail to open a KEY file? We explain what they are used for and recommend software that we know can open or otherwise handle your .KEY files.

What is a KEY file?

Files with the .key file extension have usually been created by the Apple Keynote presentation software. Keynote was developed by Apple and is run on the Mac operating system. The KEY files created by this software are similar to PowerPoint files, but they are for Mac users and are not functional on Windows computers.

The KEY files that are created by Keynote contain slides that include text, images, presentation transitions and XML data. This data is then shown in a presentation style format when a user launches the file.

The .key file extension is also used by the AntiVir Personal Edition software. The AntiVir Personal Edition software is a free anti-virus application that can be downloaded from the Internet.

How to open KEY files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension KEY for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different KEY openers which you will find listed below.

Suggest another file format using extension KEY

While we know of one file format using the .KEY file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .KEY file.

Various viewers for this file format

These apps are known to open certain types of KEY files. Remember, different programs may use KEY files for different purposes, so you may need to try out a few of them to be able to open your specific file.

WinRARWinRARUser submitted
Free File ViewerFree File ViewerUser submitted
Final Media PlayerFinal Media PlayerUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
Adobe AcrobatAdobe AcrobatUser submitted
iTunesiTunesUser submitted
What's On My KeyWhat's On My KeyUser submitted
FreeCommanderFreeCommanderUser submitted
PRIMERPRIMERUser submitted
We have not verified any software that we know for certain will work with KEY-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with KEY-files. If you know one, please use the 'Suggest a program' link below and tell us about it!