To view a PowerPoint presentation without having PowerPoint installed, you can use PowerPoint for the web (a free online version of PowerPoint), Google Slides, or a third-party PPTX viewer. You can also use LibreOffice Impress, which is a free and open-source presentation software that supports PowerPoint files. [1, 2, 3, 4, 5, 6, 7]  
Here's a more detailed breakdown: 
1. PowerPoint for the Web: 

• If you have a Microsoft account, you can access PowerPoint for the web for free on the Microsoft website. [1]  
• Sign in to your Microsoft account and upload your PowerPoint file to OneDrive or another cloud storage service. [1, 2]  
• Open the file in PowerPoint for the web to view and edit it. [1]  

2. Google Slides: 

• Go to slides.google.com and sign in with your Google account. 
• Create a new blank presentation or open an existing one. 
• Import the PowerPoint file by going to File > Import slides and selecting the file. 
• Note that the imported slide might appear slightly different, but the content should be visible and editable. [5, 8]  

3. Third-Party PPTX Viewers: 

• Several third-party applications, like PPTX Viewer (available on the Microsoft Store), allow you to open and view PowerPoint files without needing PowerPoint installed. [3]  
• These viewers typically offer basic viewing functionality. [3, 9]  

4. LibreOffice Impress: 

• Download and install LibreOffice, a free and open-source office suite. [5, 6, 10]  
• LibreOffice Impress, which is part of the suite, can open and display PowerPoint files. [5, 10, 11, 12]  
• This method allows you to view the presentation with a similar interface to PowerPoint. [1, 5, 13]  

AI responses may include mistakes.

[1] https://support.microsoft.com/en-us/office/view-a-presentation-without-powerpoint-2f1077ab-9a4e-41ba-9f75-d55bd9b231a6[2] https://www.reddit.com/r/powerpoint/comments/1c09sjp/pptx_on_the_web_without_powerpoint_installed/[3] https://apps.microsoft.com/detail/9np64t9094lb?hl=en-US&gl=US[4] https://www.quora.com/How-can-I-open-PPT-files-without-Powerpoint[5] https://www.youtube.com/watch?v=R5vy0Qy8qPA[6] https://slidedog.com/blog/best-presentation-software/[7] https://www.beautiful.ai/blog/10-best-free-powerpoint-alternatives[8] https://www.youtube.com/watch?v=cBzkZ3ptCKU[9] https://research.com/software/powerpoint-viewer-online-tools[10] https://ca.indeed.com/career-advice/career-development/online-presentation-tools[11] https://askubuntu.com/questions/389742/how-to-open-a-powerpoint-presentation-in-ubuntu[12] https://opensource.com/business/16/9/alternatives-powerpoint[13] https://slidedog.com/blog/best-powerpoint-alternatives-and-presentation-tools/