File Extension Library

.KEY File Extension

  • Category: Misc Files

What are .KEY files and how to open them?

Can't open .KEY file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .KEY file.

What is a .KEY file extension?

.KEY file extension has been classified as Misc Files.

.KEY is Software License Key File

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.

File Type 2:

LightWave License File

Developer by: NewTek Category: Misc Files

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:



Mac OS X:

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

List of all softwares that can open the LightWave License File
NewTek LightWave 3D
NewTek LightWave 3D
File Type 3:

Security Key

Category: System Files

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.

File Type 4:

Keynote Presentation

Developer by: Apple 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.

KEY file open in Apple Keynote 7

Keynote is one of Apple's three productivity apps that make up iWork, along with Pages and Numbers. These applications are Apple's versions of the more popular PowerPoint, Word, and Excel programs, which are developed by Microsoft and available in the Office suite. The iWork apps are developed for macOS and iOS but can also be accessed using a browser on a Mac or PC through iCloud.

Keynote presentations can be used for academic, business, or personal purposes. You can choose to start your presentation from one of the templates provided with the program or from scratch. When you are finished creating your presentation you can share it directly from your device or through Keynote Live.

You can also export a KEY presentation to another format such as .PDF, .HTML, QuickTime .M4V video, or as a .JPEG, .PNG, or .TIFF image. If you need to open it in Keynote '09 or earlier you can export it in that format, as well. But the most useful export option is to the PowerPoint format, either .PPTX or .PPT.

List of all softwares that can open the Keynote Presentation
Apple Keynote
Apple Preview
Apple Keynote
File Type 5:

Keyboard Definition File

Category: Settings Files

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.

How to fix problems with .KEY files

  1. You need to update the application that you normally use to open .KEY files. Only the latest version of the software supports the current .KEY file format
  2. You need to check the .KEY file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)