What happens when you convert PPT to PPTX
- The PPT is opened by LibreOffice, the open-source office suite, on our conversion server and saved as a PowerPoint presentation (PPTX).
- Slides, text, images, shapes and most transitions carry over. Complex animations, embedded media and some effects may change.
- Password-protected documents cannot be converted, because they cannot be opened without the password.
- This conversion runs on our server: the file is uploaded, converted, and deleted together with the result as soon as the result has been sent back to you. Nothing is kept. Files up to 25 MB are accepted.
How to convert PPT to PPTX online
- Press "Choose PPT files" and select one or more files, or drag them onto the box. Files up to 25 MB each can be converted.
- There are no settings to choose: the converter keeps everything the target format can hold.
- Press "Convert to PPTX". The file is uploaded to our conversion server, converted in a few seconds, and deleted together with the result as soon as the result is sent back.
- Save each PPTX with its download button. Our server has already deleted both your PPT and the PPTX by then.
Why convert PPT to PPTX?
PPT files usually come from older presentations and slide decks from legacy systems. People convert them to PPTX because PPTX opens in PowerPoint, Google Slides and Keynote and keeps the slides editable.
In short, PPT is good at what it was made for, and PPTX is the more practical choice when the file has to open, upload or print somewhere else. PPT opens in PowerPoint, Google Slides, Keynote and LibreOffice Impress, while PPTX opens in PowerPoint, Google Slides, Keynote and LibreOffice Impress.
How to convert PPT to PPTX on Windows, Mac, iPhone and Android
On Windows
Open this page in Chrome, Edge or Firefox, drag your PPT files in from File Explorer, and press Convert. Each PPTX is saved to your Downloads folder.
On a Mac
Safari, Chrome and Firefox all work. Drag the PPT files from Finder onto the drop zone and the PPTX files land in Downloads.
On iPhone and iPad
Open the page in Safari and tap Choose PPT files. You can pick from Photos or from the Files app. The converted PPTX appears in Files, in the Downloads folder.
On Android
Open the page in Chrome, tap Choose PPT files and pick them from Files or your gallery. The PPTX is saved to the Download folder, where any file manager can find it.
Best settings for PPT to PPTX
There are no settings to choose: the PPT is opened and saved as a PowerPoint presentation (PPTX), keeping as much of its formatting as the format allows.
Check the converted file before deleting the PPT. Simple documents convert exactly; unusual fonts, complex layouts and advanced features are where differences appear.
PPT vs PPTX: the differences
| PPT | PPTX | |
|---|---|---|
| Full name | PowerPoint 97 to 2003 presentation | PowerPoint presentation |
| Type | presentation | presentation |
| Created by | Microsoft | Microsoft |
| First released | 1997 | 2007 |
| Compression | Lossless | Lossless |
| What it holds | slides with text, images and animations in a binary file | slides with text, images, charts, animations and speaker notes |
| In a browser | opens in PowerPoint, Google Slides, Keynote and LibreOffice Impress | opens in PowerPoint, Google Slides, Keynote and LibreOffice Impress |
| Common uses | older presentations and slide decks from legacy systems | presentations for work, school and conferences |
| MIME type | application/vnd.ms-powerpoint | application/vnd.openxmlformats-officedocument.presentationml.presentation |
About PPT and PPTX files
What is a PPT file?
PPT is the binary PowerPoint format used before 2007. Current versions of PowerPoint still open it, but save new presentations as PPTX.
What is a PPTX file?
PPTX has been PowerPoint's default format since 2007. Like DOCX it is a ZIP of XML files, one per slide, plus the media used in them.
PPT to PPTX not working? Common problems
- "Files up to 25 MB can be converted." Server conversions have a size limit. Compress the images in the document, or split it, and try again.
- "The conversion took too long and was stopped." Very long or complex documents can exceed the time limit. Split the document and convert the parts.
- The document will not convert. It may be password protected, damaged, or saved in a newer or unusual version of the format.
Convert PPT to PPTX from the command line
This page uses LibreOffice. Installed on your computer, it converts from the command line without opening a window:
soffice --headless --convert-to pptx input.pptConverting on your own computer keeps the file entirely local, which is worth it for very large or very sensitive documents. For everything else, the converter on this page does it without installing anything.
PPT to PPTX converter FAQ
Will I lose quality converting PPT to PPTX?
The content is kept. Office formats do not match feature for feature, so complex layouts or advanced features in the PPT may shift slightly in the PPTX.
Why is the PPTX a different size from the PPT?
The two formats store text and pictures differently, so the PPTX can be somewhat larger or smaller than the PPT. Images are carried over as they are.
Are my PPT files uploaded?
Yes, for this conversion. A faithful PPT to PPTX conversion needs LibreOffice, the open-source office suite, which cannot run in a browser. The file travels over an encrypted connection, is converted in a private temporary folder, and is deleted together with the PPTX as soon as the result has been sent back to you. We do not keep, read or share it.
Can I convert several PPT files to PPTX at once?
Yes. Select or drop as many files as you like; they are converted one after another and each gets its own download button.
How do I open a PPTX file?
PPTX opens in PowerPoint, Google Slides, Keynote and LibreOffice Impress. PPTX is common for presentations for work, school and conferences.
Is this PPT to PPTX converter free?
Yes. There is no sign-up and no watermark. Because this conversion uses our server, there is a fair-use limit of 25 MB per file and a number of files per hour, which stops the service being overloaded.
Can I convert PPT to PPTX on my phone?
Yes. It works in Safari on iPhone and iPad and in Chrome on Android. The conversion happens on our server, so it is as fast on a phone as on a computer; the PPTX is saved to your Downloads folder.