There are 8 other file types using
the KEY file extension!

empty icon.key - Licence or encrypted security key [common]

key icon.key - iWork Keynote '09 presentation [common]

empty icon.key - OS/2 archive key

empty icon.key - ArcView geocoding matching keys

empty icon.key - DataCAD custom toolbar file

empty icon.key - Keyboard definition file

empty icon.key - Avira AntiVir Personal license key

empty icon.key - BioWare Infinity and Aurora game engine resource data

KEY file extension - Microsoft Windows 7 registry key file

What is key file? How to open key files?

File type specification:

System file type icon System file type

key file icon: key filetype icon

The key file extension is used in Windows 7 much like REG format in previous  versions of Windows. It is a file that contains registry information.

You can simply add the registry entry with double clicking on the .key file. You can also view and read the content in any text editor.

Be careful when handling registry file, they might contain malicious code or otherwise corrupt your computer. Always be sure to install registry entries from reliable sources.

The default software associated to open key file:

Microsoft Windows 7 icon

Microsoft Corporation logoMicrosoft Windows 7  Microsoft Windows software

Company or developer:
Microsoft Corporation

Operating system released in 2009 available for desktops, notebooks, netbooks, tablets and media centers. It was replaced by Windows 8 and Windows 10. Support ends on January 14, 2020.

Microsoft distributes Windows 7 in four editions: Windows 7 Starter is designed for netbooks. Windows 7 Home Premium is used in home computers and notebooks. Windows 7 Professional is for business using and Windows 7 Ultimate contains all features from all previous Windows 7 editions and some others.

Windows Registry Editor icon

Microsoft Corporation logoWindows Registry Editor  Microsoft Windows software

Company or developer:
Microsoft Corporation

Registry Editor is a tool intended for advanced users. It is used to view and change settings in the system registry, which contains information about how your computer runs. Windows refers to this information and updates it when you make changes to your computer, such as installing a new program, creating a user profile, or adding new hardware. Registry Editor lets you view registry folders, files, and the settings for each registry file.

Related articles:

Best registry utilities for Windows

Help how to open:

Opening the file in windows results in the registry data being added Windows. A *.key file can also be viewed/edited using in any text editor.

How to convert:

Although you can technically "convert" key registers much like any other text file, there is practically no reason to do it, as such conversions would be pointless.

Find conversions from key file:

key to doc

key to pdf

key to pps

key to ppt

key to pptx

key to txt

key to word

Find converter to key file type:

keynote to key

pdf to key

pps to key

ppsx to key

ppt to key

pptx to key

txt to key

List of software applications associated to the .key file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open key file, edit key file, convert key file, view key file, play key file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting key files.

Software that open key file - Microsoft Windows 7 registry key file

Programs supporting the exension key on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open key file action.

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