Best Free PPS to PPTX Converter Software for Windows

Here is a list of Best Free PPS to PPTX Converter Software for Windows. Using these software, you can convert PPS or PowerPoint Slideshow files to  Microsoft PowerPoint Open XML (PPTX) format. Both are Microsoft PowerPoint format and used to store presentation data. However, PPTX is a more commonly used format and thus if you want to convert PPS to PPTX, you can use these software. These software also lets you convert PPS to PPT, PDF, ODP, XML, HTML, and other presentation formats.

Prior to PPS to PPTX conversion, you can make changes to the PPS slides. You can edit the text content of slides as well as make modifications to slide layout, font formatting, animation effects, transition effects, insert images, videos, etc., and do more. Apart from that, these also let you encrypt the output presentation files before starting the conversion. You can play the slideshow to visualize modifications in the source PPS file. Next, you can use a dedicated conversion option to start PPS to PPTX conversion.

These are basically office suite software that also provide you other office applications. You can process text documents and spreadsheet files in the office suites. You can checkout the article to know more about these converters.

My favorite PPS to PPTX Converter Software for Windows:

LibreOffice Impress is my favorite converter on this list. It is a feature-rich presentation software that offers you a lot of great tools and options. You can view and edit PPS file and then convert it to PPTX and multiple other formats.

You may also like some best free PPS to PPT Converter SoftwareOpen Source Presentation Software, and PowerPoint Template Maker Software for Windows.

LibreOffice Impress

LibreOffice Impress is a free open source PPS to PPTX converter software for Windows, Linux, and macOS. This software is a part of feature rich office suite called LibreOffice. You also get other productivity task software in this package that include LibreOffice Writer, LibreOffice Draw, LibreOffice Calc, etc.

It lets you convert PPS to multiple versions of PowerPoint presentations including PPTX, PPT, etc. You can also edit PPS file prior to conversion using tools like slide layout, insertion features, text formatting options, animation properties, transitions, etc. Other than PPTX, you can convert PPS to PDF, XML, VBA, ODP, etc. Let us have a look at the steps of PPS to PPTX conversion in it.

How to convert PPS to PPTX using LibreOffice Impress:

  • Firstly, open a PPS file in this software and a slideshow will start. You can stop the slideshow by right clicking the slideshow and then pressing the Edit presentation option.
  • Next,  view and edit PPS slides as per your requirements.
  • After that, click the File > Save As option and then select the PowerPoint 2007 (PPTX) format option.
  • At the end, hit the Save button to start the PPS to PPTX conversion process.

Final Thoughts:

It is one of the best free PPS to PPTX converter software which lets you view, edit, and convert PPS files to PPTX and various other formats.

SoftMaker FreeOffice

SoftMaker FreeOffice is another PPS to PPTX converter software for Windows, Linux, and Mac. It is basically a free office suite that provides different office modules including TextMaker, PlanMaker, and Presentation. Using its Presentation software, you can convert PPS to PPTX and other formats like PPT, PDF, etc. You can also edit the PPS presentation before converting it to PPTX format.

How to convert PPS to PPTX using SoftMaker FreeOffice:

  • Open Presentation application and open a PPS file in it.
  • Now, edit the source PPS file using provided designing tools
  • Next, click the Save as option and then set output format to PPTX format.
  • Lastly, start the conversion process by clicking the Save button.

Additional Feature:

  • Document Protection: It lets you password protect your presentation prior to conversion.


It is a nice and easy to use office suite that provides a presentation module using which you can convert PPS to PPTX.

ONLYOFFICE Desktop Editors

ONLYOFFICE Desktop Editors is another office software that allows conversion of PPS to PPTX. It contains three office modules that are Spreadsheet, Document, and Presentation. In order to convert PPS or any other presentation file, you need to open its Presentation module. Using it, you can create, edit, or convert presentation files like PPS, PPTX, etc. Apart from PPTX, you can also convert PPS to PDF, ODP, etc.

It offers a good number of designing tools that you can use to edit PPS file before conversion, such as text editing, font formatting, slide formatting, change transition and animation effects, and more. You also get additional tools in its Plugins tab, like Translator, Photo Editor, Thesaurus, Send (via email), etc. Now, you can checkout steps of PPS to PPTX conversion below.

How to convert PPS to PPTX using ONLYOFFICE Desktop Editors:

  • Launch this software and then browse and open a PPS file in it.
  • Now, edit PPS slides according to your requirements.
  • After that, go to the File menu and click the Save as option.
  • Later, select PPTX as output format and click Save button to start conversion.

It lets you encrypt the output presentation.


It is a good free office suite that enables you to work on different types of files and also lets you convert PPS to PPTX.

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Komal Srivastava

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