What is and How to Open KEY File in Windows, MAC and online

iWork Keynote ’09 presentation file definition and 9 other types and linked programs information.


How to Open Key Files


The File extension key is used by the following type(s):

 iWork Keynote ’09 presentation 

Programs that open key files:


Microsoft Windows 7 registry key

It 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.

Programs that open key files:

  • Microsoft Windows 7
  • NotePad


ArcView geocoding matching keys

It is used by ESRI ArcView for a format that contain geocoding matching keys in ODB format. Probably some sort of specialized GIS file type.Software:


Avira AntiVir Personal license key filesn>

KEY file suffix is related to Avira AntiVir and used for a format that hold license data.


  • Avira AntiVir Personal


BioWare Infinity and Aurora game engine resource

It is also used in Bioware’s Infinity and Aurora game engines for files that hold some resource data. Used in such successful titles as Baldur’s Gate or Neverwinter Nights.


  • Baldur’s Gate
  • Neverwinter Nights


DataCAD custom toolbar 

It 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.


  • DataCAD (Microsoft Windows)


Keyboard definition

It is sometimes used for settings format that contains saved keyboard layouts, shortcuts, keybinds or other configuration data for keyboards. Such formats are frequently used in computer games.Programs:

  • Delta Force
  • Diablo II
  • SmartWare


Licence or encrypted security files

It is frequently used by various programs for files that hold various encrypted data or keys, such as program licenses.

These are not meant to be opened directly. Programs access them to verify legally purchased licenses and such. For example antivirus programs like Avira or Kaspersky use *.key files to store personal licenses.

Also used for various encrypted (keys) by security programs.


  • Avira AntiVir Personal (Windows)
  • Avira AntiVir Premium 
  • Avira Premium Security Suite (Microsoft Windows)
  • Estimator
  • Forecast Pro
  • Kaspersky Anti-Virus
  • Sentry 2020
  • Top Secret Crypto Gold
  • VMware Workstation


OS/2 archive key files

It is associated with OS/2 operating system and used for archive key .

Programs that open key suffix:

  • OS/2