Convert PPT to PPTX Online
Free, fast, and secure. Convert PPT files to PPTX directly in your browser — no uploads, no limits.
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About PPT to PPTX Conversion
Adapt your documents for any workflow or platform. From legacy format support to modern document standards, we ensure your content transfers perfectly between formats.
How to Convert PPT to PPTX
Converting files has never been easier or more secure. MixConvert uses advanced browser-based technology to process your files instantly without uploading them to a remote server. Follow these simple steps to get started:
- Select Your Files: Select your PPT files by clicking the upload zone or dragging them directly onto the page.
- Choose Output Format: Confirm PPTX is set as the destination format in the format selector.
- Convert Instantly: Click the convert button to begin. Your PPT files will be processed locally in seconds.
- Download: Save your new PPTX files directly to your device. Batch download available for multiple files.
PPT to PPTX FAQ
Can I convert PPT to PPTX on mobile devices?
Absolutely! Our converter is fully responsive and works on any smartphone or tablet. Just visit this page, upload your PPT files, and convert them to PPTX format—no app required.
Is my data secure when converting PPT files?
100% secure. Unlike cloud converters, MixConvert processes your PPT files entirely on your device using WebAssembly. Your data stays on your computer—we never see it.
How large can my PPT files be?
We don't impose file size restrictions. Your browser handles the conversion, so the limit depends on your device's memory. Typical computers can process very large PPT files without issues.
What's the conversion speed for PPT files?
Conversion is nearly instant for typical PPT files. Your device's processor handles the work, so faster devices complete PPTX conversion more quickly.
Does MixConvert support converting multiple PPT files at once?
Batch conversion is fully supported. Upload as many PPT files as you need and convert them all to PPTX in one go. A ZIP download option makes it easy to save everything.
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Understanding the Formats
PPT
Microsoft PowerPoint 97-2003
Legacy PowerPoint format for older systems.
PPTX
Microsoft PowerPoint Presentation
PowerPoint's modern presentation format with animations, transitions, and multimedia.
Reverse Conversion
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