A file with the .pptx file extension is a Microsoft PowerPoint Open XML (PPTX) file created by Microsoft PowerPoint. You can also open this type of file with other presentation apps, like OpenOffice Impress, Google Slides, or Apple Keynote. They are stored as a compressed ZIP file, which use a bunch of other files with formatted text, images, videos, and more to open them.

What Is a PPTX File?

PPTX files are used in Microsoft PowerPoint, a presentation program used to display content in a slideshow format. Each slide can contain graphics, formatted text, videos, music, animations, and more.

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First introduced with Microsoft Office 2007 in the Office Open XML standard, PPTX is the default format when creating a presentation using modern versions of PowerPoint. Microsoft introduced this open format largely due to increased competition from Open Office and its Open Document Format (ODF). The PPTX format replaced the proprietary PPT format that PowerPoint used previously.

RELATED: What Is a .DOCX File, and How Is It Different from a .DOC File in Microsoft Word?

How Do I Open a PPTX File?

Because PPTX files have become standardized, you can open them in many applications on different platforms. Although Windows doesn’t natively open them unless you have a copy of Microsoft Office 2007—or PowerPoint 2007—or later, you can download a third-party open-source application like Apache OpenOffice or LibreOffice to open your files.

Mac users only need to double-click the file to have it open up in the Apple Keynote application.

If you’d rather store, open, and edit all your Office Open XML files in the cloud, you can do so by uploading your document via PowerPoint Online or Google Slides.

Alternatively, if you’re a Chrome user, you can download the extension Office Editing for Docs, Sheets & Slides (an official Google extension) for your browser. It lets you upload any PPTX file directly from your local hard drive to your Google Drive by dragging and dropping it into any Chrome tab.

RELATED: How to Work with Microsoft Office Files in Google Drive


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Brady Gavin has been immersed in technology for 15 years and has written over 150 detailed tutorials and explainers. He's covered everything from Windows 10 registry hacks to Chrome browser tips. Brady has a diploma in Computer Science from Camosun College in Victoria, BC.  
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