How to open .PPSX files on Linux
To open .PPSX files on Linux, if you don’t have Microsoft PowerPoint available on your Linux setup, the most reliable option is to transfer the .ppsx file to a system with PowerPoint to open it.
Step-by-step instructions
- If you don’t have Microsoft PowerPoint available on your Linux setup, the most reliable option is to transfer the .ppsx file to a system with PowerPoint to open it.
- If you only need to view it, consider converting it using a system that can open it in PowerPoint, then share as another format suitable for viewing.
Common issues
It opens as a slide show and I can’t edit
.ppsx is meant for playback, so PowerPoint opens it directly in Slide Show mode rather than the editor.
- Open Microsoft PowerPoint first, then use File > Open to open the .ppsx.
- Exit Slide Show view to return to the normal editing interface; if needed, save a copy in an editing-focused format (such as .pptx) for future changes.
The file doesn’t open because the app isn’t installed
.ppsx is a PowerPoint-specific OOXML slideshow; without Microsoft PowerPoint (or an environment that supports this OOXML variant), opening may fail.
- Install Microsoft PowerPoint or open the file on a machine that has PowerPoint available.
- If you must share with someone without PowerPoint, open it in PowerPoint and export/share in a format they can view.
A website/upload rejects the file type
Some systems validate by MIME type or an allow-list of extensions; .ppsx may be blocked even though it is a standard OOXML media type.
- If there is a file-type setting, choose the PowerPoint slideshow type or allow the MIME type application/vnd.openxmlformats-officedocument.presentationml.slideshow.
- As a workaround for upload systems that only allow .pptx, open in PowerPoint and save a copy in a permitted format.
Security note
.ppsx is designed to auto-start as a slide show in PowerPoint, so content begins running immediately on open; treat unexpected .ppsx files as higher risk than a file that opens in an editor first.