PPT to PPTX
Convert PPT files to PPTX in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert PPT to PPTX?
- PPTX is the modern Office format: smaller files and full compatibility with Microsoft 365.
- PPTX is one of the most widely supported formats — it opens almost anywhere.
You don't need to install any software to convert PPT to PPTX. Upload your file, choose PPTX and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
PPT vs PPTX: comparison
| Feature | PPTMicrosoft PowerPoint 97–2003 Presentation | PPTXMicrosoft PowerPoint Open XML Presentation |
|---|---|---|
| Developer | Microsoft | Microsoft |
| Released | 1997 | 2007 |
| Type | presentation | presentation |
| Editable content | ✓ yes | ✓ yes |
| Opens with | Microsoft PowerPoint, LibreOffice Impress, Google Slides | Microsoft PowerPoint, LibreOffice Impress, Google Slides |
Tip: convert slides to PDF or images to open them on any device.
How it works
- Choose or drop your PPT file.
- Pick PPTX as the output format.
- Click “Convert” and download your file.
PPT to PPTX: questions and answers
Will quality be lost when converting PPT to PPTX?
Text, tables and images are kept. Very complex layouts or rare fonts may shift slightly.
How long does PPT to PPTX conversion take?
Usually 1–10 seconds. Several files are processed in parallel.
What is the maximum PPT file size?
Up to 100 MB per file and up to 20 files at once — for free.
Can I convert PPT to PPTX on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a PPTX file?
PPTX files open in: Microsoft PowerPoint, LibreOffice Impress, Google Slides.
Are my files safe?
Files are used only for the conversion, never shown to anyone, and deleted automatically after 1 h. The original is deleted right after conversion.
⇄ Need the opposite? Convert PPTX to PPT →