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Convert PPT to PPTX Online for Free

by Hung Nguyen

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Use the Smallpdf converters to save your PPT to PPTX files easily. Join 40+ million monthly users today—no need to register!

Ever wondered what a PPTX file is? PPTX files are PowerPoint presentations that were released after 2007, alongside the release of PowerPoint 2007. This all happened at the same time as Microsoft’s launch of the first open XML-based Office documents that included PowerPoint presentations that were compatible with even more types of software at the time.

So, if you have a PPT file on hand and can’t figure out how to save it to PPTX manually, we've got you covered! Simply hop onto our PDF converters to quickly save it to PDF format, then change it up to PPTX.

How To Convert PPT to PPTX Online

  1. Go to our PPT converter and drag your PPT file inside the tool.

  2. Download the converted file in PDF format.

  3. Next, go to our PDF to PPT tool.

  4. Drag the new PDF into the toolbox and wait for it to convert.

  5. Et voilà! Download your new PPTX presentation.


First convert the PPT to PDF, and then to PPTX.

Will the Content of My File Change?


Nope! Once you convert PPT to PPTX, the contents of your file will stay exactly the same as the original and only the formatting will change a little. Also, once you've converted your PPT, your slideshows can be viewed on even more software than ever and not just on the outdated PowerPoint 97 version.

Of course, if you have Microsoft PowerPoint itself, you can always open the PPT to save it to PPTX manually. But we know the hefty price tag of the software means that not everyone will want to pay for it.

Cloud-based PPT to PPTX Converter


Smallpdf is a freemium SaaS product and we help users from nearly every country in the world to convert, compress, and export files from anywhere with an internet connection. As a browser-based app, you can use Smallpdf to convert PPT to PPTX files using any operating system and browser. Plus, you don't even have to create an account!

But in case you do reach the free usage limit, a Pro account will remove this limit and unlock a handful of other benefits across our tools, including batch processing.

Regardless of account type, everyone has access to TLS encryption to protect all file transfers andt our servers will erase the new PPTX along with its original document after 60 minutes for added safety and security.

Converting To Other Formats


Other than PPTX, you can also choose from many other converters on our platform to save your PPT file in different formats, including XML formats, like .docx and Excel files. All tools follow similar steps, where you upload a document, convert it if needed, and download your files.

Check out our wide range of tools via our tool page, and if you have any questions or concerns, we’re just an email away!


Convert those old .ppt to .pptx files in an instant.

Hung Nguyen
Hung Nguyen
Senior Growth Marketing Manager @Smallpdf