What is a PPSX file?
A .PPSX file is a Microsoft PowerPoint Slide Show file. Microsoft uses this format for completed presentations. When a user double-clicks the file, it opens directly in full-screen slide show mode instead of edit mode. Under the hood, the format uses the Office Open XML standard, which compresses internal XML data inside a ZIP container to save space.
How to open PPSX files?
You can open a .PPSX file natively using Microsoft PowerPoint. Free alternatives like LibreOffice Impress or Google Slides can also open and display these presentations. If you do not have these programs installed, viewer.online/ppsx analyzes .PPSX files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Best practices and troubleshooting
If you need to edit a .PPSX file, you can often simply rename the file extension from .PPSX to .PPTX. You can also open the file directly from the File menu inside Microsoft PowerPoint. If you have trouble sharing the file with users who lack presentation software, we recommend file conversion to sensible target formats like .PDF or .PPTX on convert.guru.
Summary
viewer.online/ppsx directly opens and previews .PPSX files in the browser, eliminating the need to install software or troubleshoot compatibility issues.