Open KEY File

Information, tips and instructions

Open KEY File

KEY file extension is used to store files in Apple Numbers office application file format. Apple Numbers is a free application from Apple used to create and edit spreadsheets.

KEY file is a compressed archive containing various files which compose Apple Numbers Spreadsheet. But it is not recommended to open KEY file using Zip or any other unarchiver software. It is much better to use Apple Numbers software to open KEY file. If you don’t have Apple Numbers installed or you are running an operating system other than Mac OS you can either use a KEY file online conversion software or upload your KEY file to, open it in online Apple Numbers application, and download it as Microsoft PowerPoint PPTX file from there.

Following formats are similar to KEY:

  • PPTX – Microsoft PowerPoint file format in Office Open XML format
  • PPT – older Microsoft PowerPoint file format in binary format
  • UOP – Unified Office format presentation
  • UOF – Unified Office format presentation
  • SDP – StarImpress Presentation
  • CGM – Computer Graphics Metafile
  • PDF – Portable Document Format

Apple Keynote is part of Apple iWork suite of application which includes:

  • Apple Pages. Document editing application.
  • Apple Keynote. Presentation application.
  • Apple Numbers. Spreadsheet application.

All Apple iWork applications are available for Mac OS and iOS. That means that any KEY, NUMBERS and PAGES file could also be easily opened on mobile devices with a compatible application. Also, iWork applications are available online via service. You can open KEY file using and edit it online.