# Convert PPT to PPTX

> Convert PPT to PPTX online for free in seconds. Files are processed in a secure, isolated sandbox and deleted automatically. No sign-up, no watermarks.

URL: https://www.converterrr.com/ppt-to-pptx

- Runs in an isolated cloud sandbox with LibreOffice: files are deleted automatically, and the job uses cloud credits.
- Engines: LibreOffice (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "pptx"` (paid plans).
- More: [Presentation converter](https://www.converterrr.com/presentation-converter), [PPT converter](https://www.converterrr.com/ppt-converter).

## How to convert PPT to PPTX

1. **Add your PPT files.** Drag and drop PPT files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose PPTX.** PPTX is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4. **Download your PPTX.** Download each PPTX file, or everything at once as a ZIP.

## Good to know

- PPT files are typically used for older PowerPoint decks, while PPTX is best for presentations in PowerPoint, Keynote and Google Slides.
- This conversion runs on LibreOffice in an isolated cloud sandbox. Files are encrypted in transit and deleted automatically.

## PPT vs PPTX

|  | PPT | PPTX |
| --- | --- | --- |
| Full name | Microsoft PowerPoint 97–2003 | Microsoft PowerPoint Presentation |
| Type | Presentation | Presentation |
| Extensions | .ppt | .pptx |
| MIME type | application/vnd.ms-powerpoint | application/vnd.openxmlformats-officedocument.presentationml.presentation |
| Best for | older PowerPoint decks | presentations in PowerPoint, Keynote and Google Slides |
| Properties | legacy format, proprietary | open standard |

**PPT:** PPT is the legacy binary PowerPoint format used before 2007.

**PPTX:** PPTX is the modern PowerPoint format for slide decks with layouts, media and animations.

The other way around: [convert PPTX to PPT](https://www.converterrr.com/pptx-to-ppt).

## Related conversions

- [PPTX to PPT](https://www.converterrr.com/pptx-to-ppt) (cloud)
- [PPT to PDF](https://www.converterrr.com/ppt-to-pdf) (cloud)
- [Keynote to PPTX](https://www.converterrr.com/key-to-pptx) (cloud)
- [PPT to ODP](https://www.converterrr.com/ppt-to-odp) (cloud)
- [ODP to PPTX](https://www.converterrr.com/odp-to-pptx) (cloud)

## Convert PPT to other formats

[PPT to PDF](https://www.converterrr.com/ppt-to-pdf), [PPT to ODP](https://www.converterrr.com/ppt-to-odp)

## Convert other formats to PPTX

[Keynote to PPTX](https://www.converterrr.com/key-to-pptx), [ODP to PPTX](https://www.converterrr.com/odp-to-pptx)

## PPT to PPTX: frequently asked questions

### How do I convert PPT to PPTX?

Drop your PPT file onto the converter above, make sure PPTX is selected, and click Convert. When it's done, download the PPTX file — it usually takes a few seconds.

### Is it safe to convert PPT to PPTX here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

### Is the PPT to PPTX converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

### Will converting PPT to PPTX reduce quality?

No — PPTX preserves the content of your PPT file as faithfully as the format allows.

### Can I convert multiple PPT files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert PPTX back to PPT?

Yes — use our PPTX to PPT converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.