Older .keynote presentations that were saved in previous version in then iWorks Keynote ('06 or earlier) can be transformed and converted to PowerPoint presentations and slideshows (for example .ppsx). Possibly can be done even in the latest Keynote, unless something fundamentally changed, but otherwise would require older version of the program. Some 3rd party program, such as LibreOffice may also be of help here.
Home > Search converters: keynote to ppsx
Conversion of keynote file format to ppsx file format beta
Search for keynote to ppsx converter or software able to handle these file types.
Convert iWork Keynote '06 presentation to Microsoft PowerPoint Open XML complete slide show.
We have found 3 software records in our database eligible for .keynote to .ppsx file format conversion.
Articles and other information relating to keynote into ppsx conversion:
How to open and convert Keynote presentations online using iWork for iCloud - Using iWork for iCloud for making new and conversion of old Apple documents
Apple macOS / Mac OS X software 
- convert keynote to ppsx on OS X
Keynote for Mac
The most popular presentation software for Mac
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from keynote file | Yes, Keynote for Mac supports keynote file conversion as a source file type. | Yes | Yes | keynote editor | Yes | No | No | No |
to ppsx file | Yes, Keynote for Mac supports ppsx file conversion as a target file type. | Yes | Yes | ppsx editor | Yes | No | No | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned keynote to ppsx. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple iOS (iPhone, iPad, iPod Touch devices) software 
- convert keynote to ppsx on iOS
Keynote for iOS
Presentation software for iOS operating system, developed by Apple
Multiplatform software 
- convert keynote to ppsx on any platform
LibreOffice Impress
Powerful multimedia presentation software tool from LibreOffice suite
Additional links: Open keynote file, Open ppsx file
KEYNOTE
A keynote file extension is used for presentations saved in Apple iWork Keynote '06, or in its previous versions. Keynote is a professional presentation tool for Mac OS X, macOS and iOS.
PPSX
Files with ppsx extension are used for presentation slide shows created in the popular presentations maker Microsoft PowerPoint. PPSX format is used for complete slideshows that also may include audio or video effects.
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