Convert PPT to PPTX Online
PPT is the old binary PowerPoint format from the 1990s. Converting to PPTX gives you the modern XML-based format compatible with all current Office applications.
Our converter handles all PPT files from PowerPoint 97/2000/2003 and produces fully compatible PPTX output.
What is PPT?
PPT is Microsoft PowerPoint's older binary presentation format from before 2007. It uses binary encoding with limited interoperability with non-Microsoft applications.
PPT files may not display correctly in Google Slides, LibreOffice Impress, or modern PowerPoint versions when complex animations or transitions are used.
What is PPTX?
PPTX uses the Office Open XML standard, storing slides as XML inside a ZIP archive. It is fully compatible with PowerPoint 365, Google Slides, LibreOffice, and Keynote.
Converting PPT to PPTX ensures your presentations display correctly in all modern applications and collaborative platforms.
Why Convert PPT to PPTX?
Modern Compatibility
PPTX works perfectly with PowerPoint 365, Google Slides, LibreOffice, and Keynote.
Online Collaboration
PPTX exports to PDF and video more reliably than the older PPT format.
Better Export
PPTX exports to PDF and video more reliably than the older PPT format.
Open Standard
PPTX is an ISO standard format with guaranteed long-term support.
How to Convert PPT to PPTX
Upload PPT
Select your old PPT file.
Choose PPTX output
Select PPTX as your output format.
Convert
Click convert. The conversion preserves slides, animations, and formatting.
Download PPTX
Save your modern PPTX file.
Ready to Convert PPT to PPTX?
Use our free online converter. No signup, no watermarks, no limits.
Convert PPT to PPTX NowPro Tips
Review animations
Some older PPT animations may convert differently in PPTX. Review before presenting.
Check fonts
Fonts not available on modern systems may substitute in the converted PPTX.
Test on target system
Always test the converted PPTX on the computer you will use for the presentation.
参考资料
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Our converter handles all PPT files automatically with no quality loss.
Files are processed securely and deleted after 1 hour for your privacy.
Convert PPT to PPTX Now