PPT to PPTX Converter
Upgrade an old PowerPoint 97-2003 (PPT) deck to the modern PPTX format.
Complete the security check to begin
About Converting PPT to PPTX
PPT is the older binary PowerPoint format used through 2003. It is usually upgraded to PPTX for smaller, more reliable files. When you need to move away from PPT, the usual reason is simple: binary and corruption-prone.
Converting your PPT presentation to PPTX solves that. PPTX is the modern Microsoft PowerPoint format, a ZIP of XML that stores slides, animations, media and speaker notes. It is the standard for presentations. In practice you gain rich slides with media and animation and open xml standard. PrivConvert runs the whole PPT-to-PPTX conversion in server memory and deletes your file the instant the PPTX is ready — nothing is stored, logged or reused.
When this conversion helps
- You need rich slides with media and animation
- You need open XML standard
- You need editable everywhere
- Escaping a proprietary PPT file for the open PPTX standard
- Sharing a PPT presentation with someone whose software expects PPTX
Tips for best results
- After converting, open the PPTX and skim the formatting — complex layouts occasionally need a small touch-up.
- Files up to 250 MB are supported, and you can batch-convert several PPT files at once; each is processed privately and deleted immediately.
How to Convert PPT to PPTX Online
Turning a PPT file into PPTX is straightforward here — upload, convert, download. What you gain with PPTX: rich slides with media and animation.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from PPT to PPTX starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
A more private way to convert PPT files
Plenty of sites convert PPT files. Very few promise never to keep them — PrivConvert does, and backs it up with how the service is built.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.
We never keep a copy. Once your PPTX is delivered, both the original and the result are gone — there is nothing left to leak or misuse.
PPT vs PPTX - Format Comparison
| Feature | PPT | PPTX |
|---|---|---|
| File extension | .ppt | .pptx |
| Full name | Legacy PowerPoint Presentation | Office Open XML Presentation |
| Introduced | — | 2007 |
| Encoding | Binary | Binary |
| Editable | Yes | Yes |
| Open standard | — | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Trusted by thousands of users
Professionals reach for PrivConvert when the document they are converting is sensitive and cannot be left sitting on someone else’s server.