You need to view a document or other file in Windows. But you don’t have the right application to open the file, or you just want to quickly peek at it without taking the time to launch the full app.

Keynote is Apple’s powerful presentation software, native to macOS and iOS. When a Keynote file (typically a .key extension) is shared with a user running Windows, opening it can seem impossible.

Microsoft uses file associations to set default programs for opening different file types on all its operating systems. As a result, when you open a file, be it text, image, or document, on your ...