KEY File Type

- The quick facts

What are KEY files and how to open them

Are you having problems opening a KEY file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a KEY file?

KEY files have multiple uses, and Apple Keynote Presentation is one of them.

Apple Keynote Presentation

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 primarily intended for Mac users.

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

How to open KEY files

Important: Different programs may use files with the KEY file extension for different purposes, so unless you are sure which format your KEY file is, you may need to try a few different programs.

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

Last updated: June 29, 2022

All known file formats using extension .KEY

While Apple Keynote Presentation is a popular type of KEY-file, we know of 10 different uses of the .KEY extension. Different software may use files with the same extension for different types of data.

Keyboard Key Mapping File

Key mappings are used to "map" certain keyboard key combinations to certain application features. It may be a simple key-to-character mapping that causes a specific character to be displayed when a key is pressed, to a combination of keys that, when pressed, triggers an event in the associated application.

You usually do not need to edit or view these files, as they only contain information usable by the software program that uses them.

Software License Key

License keys are used to enable features of a software product. They come in many shapes and forms, from simple keys consisting of letters and numbers that you have to type into the application to advanced encrypted files that contain the name of the licensee, key expiration date, etc.

Different software use keys in various formats, so you need to know precisely which application your license key file belongs to. Further, you need to follow the instructions on where to place the file to activate the application, as that also differs from application to application.

You usually do not need to edit or view these files, as they only contain information usable by the software program that uses them.

More file formats using the KEY extension

Through our research of KEY files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • ASCII Armored RSA Private Key
  • IDA Serial Key
  • Infinity Engine Resource Directory
  • JAY MSA Registration Key
  • Kaspersky Anti-virus For DOS License Key
  • SSH/SECSH Public Key File Format
  • Suncom F-15E Eagle Joystick Keys Configuration

Various apps that use files with this extension

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.

Final Media PlayerFinal Media PlayerUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
Adobe AcrobatAdobe AcrobatUser submitted
Hancom OfficeHancom OfficeUser submitted
iTunesiTunesUser submitted
What's On My KeyWhat's On My KeyUser submitted
FreeCommanderFreeCommanderUser submitted
PRIMERPRIMERUser submitted
KeyViewerKeyViewerUser submitted
MKEditorMKEditorUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about KEY file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.