Open KEY file

KEY files: what are they and how do I open them?

key file icon Are you facing difficulties opening unknown files on your computer, or wondering exactly what this file is?
We've got the information and best software solutions for opening these files effortlessly.

.key file type #1: Encryption key

Various .key files are typically utilized for storing data related to license keys. These files serve to confirm that the user possesses a legally acquired version of the software.

Further details:

Many .key files are used for various encrypted license or security files.

These files are often provided by a software manufacturer as proof of purchase and to unlock the full functionality of a software program.

Other types of .key files might be used to encrypt or decrypt data, ensuring that only those with the correct key file can access the sensitive or confidential information.

Open file with:

Kaspersky Anti-Virus icon

Kaspersky Anti-Virus

One of the more popular antivirus programs

Avira Premium Security Suite icon

Avira Premium Security Suite

A computer security software

Avira AntiVir Premium icon

Avira AntiVir Premium

A popular antivirus software

Avira AntiVir Personal icon

Avira AntiVir Personal

A free antivirus for computer prorection


A construction cost estimating program

Sentry 2020

A data protection tool

Forecast Pro

A professional forecasting program

Top Secret Crypto Gold

An encryption software for Windows

VMware Workstation icon

VMware Workstation

VMware Workstation is application used to create computer virtual machines in one hosting operating system

LightWave 3D icon

LightWave 3D

A 3D computer graphics editor

.key file type #2: ArcView geocoding matching keys

Files with key file extension can also be found GIS files with geocoding matching keys data for ESRI ArcView.

Further details:

The key file extension is used by ESRI ArcView for files that contain geocoding matching keys in ODB format.

Probably some sort of specialized GIS file type for mapping purposes.

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ArcGIS for Desktop Basic (ArcView) icon

ArcGIS for Desktop Basic (ArcView)

A GIS application used to work with geographic data


A software for processing and analyzing of geospatial images

.key file type #3: Avira AntiVir Personal license key

A key file extension is used for files that store license keys of Avira AntiVir program. Probably used to validate the copy of the program.

Further details:

The key file extension is associated with Avira AntiVir Personal, a reliable and free antivirus solution that protect computer against viruses, Trojan horses and other malicious software, developed by Avira.

The key file stores license keys obtained when a license is purchased.

Open file with:

Avira AntiVir Personal icon

Avira AntiVir Personal

A free antivirus for computer prorection

Avira AntiVir Premium icon

Avira AntiVir Premium

A popular antivirus software

Avira Premium Security Suite icon

Avira Premium Security Suite

A computer security software

.key file type #4: BioWare Infinity and Aurora game engine resource data

A key file stores central reference point to locate files required by the game based on BioWare Infinity or Aurora engine.

Further details:

The key file extension is also used in Bioware's Infinity and Aurora game engines for files that hold some resource data (central reference point to locate files required by the game).

Used in such successful titles as Baldur's Gate or Neverwinter Nights.

Open file with:

Baldur's Gate icon

Baldur's Gate

Famous computer role-playing game from BioWare

Neverwinter Nights icon

Neverwinter Nights

A highly praised RPG computer game from Bioware

Baldur's Gate II icon

Baldur's Gate II

A fantasy role playing game from Bioware

Planescape: Torment icon

Planescape: Torment

An RPG video game from popular AD&D setting

Icewind Dale

A famous RPG game

.key file type #5: DataCAD custom toolbar file

Files with key extension are used by the DataCAD application. They are used as a customization files.

Further details:

The key file extension is also used by DataCAD 3D CAD software.

A *.key file used in this program contains customized toolbar that can be imported to the program. Old file format replaced by DTB format in latest versions of DataCAD.

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A professional-level A/E/C 3D software

.key file type #6: iWork Keynote '09 presentation

Files with key extension can be often found as presentations saved in latest versions of Apple (iWork) Keynote, a professional presentation tool for Mac OS X, macOS and iOS.

Further details:

File extension key is also used in Keynote, a presentation software application developed as a part of the iWork productivity suite (which also includes Pages and Numbers applications) by Apple Inc.

The Keynote Presentation is XML based and may contain basic text documents or elaborated multi-page brochures, including images, special texts, tables, graphs, charts and more. be created from a blank page or based on saved template.

A .key file from Keynote is essentially compressed ZIP archive that contains a the main presentation document, previews and some metadata.

Previous versions of iWork Keynote used the keynote file extension instead.

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Keynote for Mac icon

Keynote for Mac

The most popular presentation software for Mac

Keynote for iOS icon

Keynote for iOS

Presentation software for iOS operating system, developed by Apple

PDF to Keynote

A simple PDF to Keynote converter

iWork icon


Office productivity suite from Apple

LibreOffice Impress icon

LibreOffice Impress

Powerful multimedia presentation software tool from LibreOffice suite

iWork for iCloud icon

iWork for iCloud

An on-line version of Pages, Numbers, and Keynote

.key file type #7: Keyboard definition file

Files with key extension can be also quite often found as various settings that contain keyboard layouts, keybinds or other data.

Further details:

File extension key is sometimes used for settings files that contains saved keyboard layouts, shortcuts, keybinds or other configuration data for keyboards. Such formats are frequently used in computer games.

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A programming platform

Delta Force icon

Delta Force

A tactical first-person shooter computer game

Diablo II icon

Diablo II

Legendary dark fantasy hack and slash action computer game

.key file type #8: Microsoft Windows 7 registry key file

Files with key file extension can also be found as registry entries for o Microsoft Windows operating system.

Further details:

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.

Open file with:

Microsoft Windows 7 icon

Microsoft Windows 7

One of the newer members of Windows OS family

Windows Registry Editor icon

Windows Registry Editor

Registry viewer and editor for Windows

Registry Workshop

An advanced registry editor

Microsoft Windows NotePad icon

Microsoft Windows NotePad

The basic simple text editor included in Microsoft Windows operating systems

Microsoft Windows 8 icon

Microsoft Windows 8

First operating system from Windows family designed with touchscreens in mind

Microsoft Windows 10 icon

Microsoft Windows 10

Operating system for deskop, laptop and tablet computers

.key file type #9: OS/2 archive key

A key file extension is related to the IBM OS/2 operating system and used for its archive key files.

Further details:

The key file extension is associated with OS/2, an operating system for IBM-PC compatible computers. The .key file stores archive key.

The IBM OS/2 operating system was discontinued and replaced by eComStation (eCS).

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OS/2 icon


An older computer operating system developed by IBM for PCs

What is the meaning of a file extension?

File extensions are characters that appear after the dot in a computer file's name. For example, the file "unknown-file.key" has the file extension "key". This is used to identify which program should open the file or what file type it is.
File extensions help you organize and manage files. They provide a quick and easy way to identify and associate the file type with the appropriate software.

We can help you open your file

In our database, we have collected a huge number of different file extensions, detailed descriptions, and programs that can be used to open or otherwise work with the file extensions listed in our database.
This database is an invaluable resource for users who want to understand better file extensions and what they can do with them. It also allows users to know different file types with the same purpose.

Only verified software links are provided

We have verified every software listed in our database. The software listed in our database includes links to the developer's or software's website. These links should allow you to download the right program for each file type. Using verified software from reputable sources helps minimize the risk of malware and viruses infecting your computer.