As both the PPSX and PPTHTML file type originate from Microsoft PowerPoint, it is probably the easiest way to use that program to simply re-save one to another.
Home > Search converters: ppsx to ppthtml
Conversion of ppsx file format to ppthtml file format beta
Search for ppsx to ppthtml converter or software able to handle these file types.
Convert Microsoft PowerPoint Open XML complete slide show to Microsoft PowerPoint HTML presentation.
We have found 2 software records in our database eligible for .ppsx to .ppthtml file format conversion.
Microsoft Windows software 
- convert ppsx to ppthtml on Windows
Microsoft PowerPoint
A presentation program from the Microsoft Office suite
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from ppsx file | Yes, Microsoft PowerPoint supports ppsx file conversion as a source file type. | Yes | Yes | ppsx editor | Yes | No | No | No |
to ppthtml file | No | Yes | Yes | ppthtml 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 ppsx to ppthtml. 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 macOS / Mac OS X software 
- convert ppsx to ppthtml on OS X
Microsoft PowerPoint for Mac
Mac version of popular presentation software from Microsoft
Additional links: Open ppsx file, Open ppthtml file
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.
PPTHTML
A ppthtml file extension is related to the Microsoft PowerPoint a presentation tool. A ppthtml file stores presentation in HTML file format.
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