FAQs › What is the difference between PowerPoint PPT/PPTX and PPS/PPSX files?

PPT and PPTX files are PowerPoint Presentation files. These files automatically open in edit mode when using the full Microsoft PowerPoint program.
PPS and PPSX files are PowerPoint Slide Show files. These files automatically open in slide show/presentation mode and are viewable on any computer using PowerPoint Online or the mobile app.

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