Convert PPSX to PPT — Free Online Converter
Convert PowerPoint Open XML Slide Show (.ppsx) to Microsoft PowerPoint (.ppt) online for free. Fast, secure document conversion with no watermarks or ...
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How to Convert
Upload your .ppsx file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .ppt file when it's ready.
About PPSX to PPT Conversion
PPSX is the modern PowerPoint Open XML Slide Show format (Office 2007+) that auto-plays as a slideshow. PPT is the legacy PowerPoint binary format (97-2003) that opens in editing mode. Converting PPSX to PPT downgrades the modern slideshow to the legacy editable format — useful for compatibility with older systems and PowerPoint 2003 or earlier.
This conversion changes both the format (OOXML to BIFF binary) and the open behavior (slideshow to edit mode), producing an editable legacy presentation.
Why Convert PPSX to PPT?
Some organizations and systems still require PowerPoint 97-2003 format for compatibility with legacy software, templates, and workflows. Converting PPSX to PPT ensures the presentation works on older machines and integrates with systems that cannot process OOXML files.
PPT format is also required by some kiosk systems, legacy presentation hardware, and enterprise automation tools that were built for the binary PowerPoint format.
Common Use Cases
- Downgrade PPSX slideshows for compatibility with PowerPoint 2003 and earlier
- Convert PPSX files for legacy kiosk systems that only accept PPT format
- Produce editable PPT versions of PPSX slideshows for content modification
- Migrate PPSX files to PPT for enterprise systems requiring legacy binary format
- Convert PPSX training materials to PPT for organizations using older Office versions
How It Works
LibreOffice opens the PPSX OOXML file and saves as PPT binary (BIFF) format. XML-based slide content is converted to binary BIFF records. Slides, text, images, shapes, and basic formatting are mapped to their binary equivalents. Modern OOXML features without PPT equivalents (SmartArt, advanced charts, modern transitions) may be simplified or rasterized. PPT format limits: 2GB file size, 65,536 paragraph limit per text box.
Quality & Performance
Standard presentation content converts accurately. Text, images, basic shapes, and formatting are preserved. Modern OOXML features (SmartArt, advanced chart types) may be simplified to basic shapes. Some animations and transitions may not have exact PPT equivalents. Verify the output in the target PowerPoint version.
Device Compatibility
| Device | PPSX | PPT |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Tips for Best Results
- 1Only downgrade to PPT when the target system specifically requires the legacy format
- 2Verify SmartArt and modern chart types — they may simplify during conversion
- 3PPT opens in edit mode — useful for modifying presentations that were view-only in PPSX
- 4For auto-play behavior in legacy format, save as PPS instead of PPT
- 5Test the converted file in the target PowerPoint version before distribution
PPSX-to-PPT conversion enables backward compatibility with legacy systems while switching from slideshow to editing mode.