.KEY File Extension

There are 6 file types use the .KEY file extension:

  1. Software License Key File
  2. LightWave License File
  3. Apple Keynote Presentation
  4. Security Key
  5. Keyboard Definition File
  6. Keynote Presentation

1. Software License Key File

Software License Key File
  • Developer N/A
  • Popularity
    3.9 (531 votes)
  • Category Misc Files
  • Format N/A

A KEY file is a generic file extension used by various programs when registering legal copies of the software. It may be saved in a plain text format but generally contains some form of encrypted key string that authenticates the purchase and registers the software.

Since KEY files are used by various software products, no single program will be able to open them. Instead, you will have to know which program a KEY file corresponds to in order to use it to register the software.

Software's name License Platforms
Used by various programs Used by various programs MacWindows

Updated: October 5, 2015

2. LightWave License File

LightWave License File
  • Developer NewTek
  • Popularity
    3.8 (329 votes)
  • Category Misc Files
  • Format N/A

Software registration file used by LightWave, a professional 3D rendering application; stores the 16-digit license key and enables users to have a legal copy of the software.

For LightWave 10, licenses are saved to the following directories:

Windows:

[user]\.NewTek\LightWave\10.0\licenses\

Mac OS X:

[user]/Library/Application Support/NewTek/LightWave/10.0/licenses/

Software's name License Platforms
NewTek LightWave 3D NewTek LightWave 3D Commercial MacWindows

Updated: December 19, 2015

3. Apple Keynote Presentation

Apple Keynote Presentation
  • Developer Apple
  • Popularity
    3.7 (111 votes)
  • Category Data Files
  • Format Zip

A KEY file is a presentation created by Apple Keynote, a macOS and iOS presentation application. It contains slides that may include text, images, shapes, charts, tables, transitions, audio, video, and notes. KEY files are the primary file type associated with Keynote similarly to .PPTX files with Microsoft PowerPoint.

You can open KEY files with Apple Keynote in macOS and iOS. To open a KEY file with Keynote on a Mac, select File → Open... in Keynote. If you are looking to only view the KEY presentation, you can open it with Apple Preview, and each slide is presented as a static image.

You can also upload KEY files to the iCloud version of Keynote in your web browser (requires an Apple ID). This is helpful for Windows users who don't have access to the Mac or iOS versions of Keynote. In the iCloud application, you can view, edit, save, and download KEY presentations.

Software's name License Platforms
Apple iCloud Apple iCloud Free Web
Apple Keynote Apple Keynote Bundled iOSMacWeb
Apple Preview Apple Preview Bundled Mac

Updated: May 25, 2021

4. Security Key

Security Key

A KEY file is a file used to contain registration information or a security code for a software program. It is often created when the program is registered and typically stored in the program's application folder or the system preferences folder.

Software's name License Platforms
Various programs that save registration information Various programs that save registration information MacWindows

Updated: February 4, 2016

5. Keyboard Definition File

Keyboard Definition File

Defines keyboard shortcuts or keyboard layouts for different languages; maps keys to different characters for different languages; stores custom keyboard shortcuts for some programs; used by operating systems for keyboard layouts.

Updated: August 28, 2006

6. Keynote Presentation

Keynote Presentation
  • Developer Apple
  • Popularity
    3.3 (57 votes)
  • Category Data Files
  • Format Zip

A KEY file is a presentation created by Apple Keynote, a macOS (OS X) and iOS program used to create presentations. It contains slides that may include text, images, shapes, charts, tables, transitions, audio, video, and notes. KEY files are stored in the Mac OS X package format and also store .XML data used by the presentation.

Software's name License Platforms
Apple Keynote Apple Keynote Bundled iOSMacWeb
Apple Preview Apple Preview Bundled Mac

Updated: November 7, 2017

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