4 Best Free Open Source PowerPoint Viewer Software for Windows

Here is a list of Best Free Open Source PowerPoint Viewer Software for Windows. Using these free software, you can view PowerPoint presentations and multiple other presentation files. As these are open source, you can download, access, study, and manipulate source code of these software without restrictions.

In these open source PowerPoint viewers, you can view presentations of various Microsoft PowerPoint formats including PPT, PPTX, PPS, PPTM, etc. Besides PowerPoint, you can view other presentation files too, e.g., Uniform Office Format Presentation, Apple Keynote, Legacy StarOffice Presentations, ODF Presentation, etc. These software provide you several slideshow features to show presentation on fullscreen. You can easily navigate from one to another slide, pause slideshow, resume slideshow, stop slideshow, etc., using mouse or hotkeys. Besides that, you can apply different transition effects to slides, animate key-elements of a slide, customize slide duration, delay, and other properties, etc.

As these are basically presentation design software, so you get all the standard presentation making tools in these software. These tools include slide layouts, add images, tables, video, icons, and more, format text, set up background, and more. Furthermore, additional features like password protection, spellcheck, auto-correct, plugins, and more are also available in these. All in all, these are great free open source PowerPoint viewer software that also let you view other presentation files.

My Favorite Free Open Source PowerPoint Viewer Software for Windows:

LibreOffice Impress is my favorite software as it lets you view PowerPoint and a lot of other presentations. Plus, it contains an extensive set of presentation editing functions. Additionally, it is clean and intuitive that makes it user-friendly.

You may also checkout lists of some best free Open Source PDF EditorOpen Source Office Suite, and Open Source Writing Software for Windows.

LibreOffice Impress

LibreOffice Impress is a free open source PowerPoint viewer software for Windows, Mac, and Linux. It is a dedicated presentation designer software using which you can view presentations of multiple formats. You can basically view presentations in formats like PPT, PPTX, PPS, ODF presentations, Apple Keynote, Legacy StarOffice Presentations, and more. It supports most of the presentation file formats to import and view.

Besides that, you can also create or edit these presentations using its designing tools. It provides several inbuilt presentation templates, slide layout, background options, insert tools, formatting features, and many other functions. Additionally, you also get spellcheck, color replacer, auto-correct option, and some other handy features that further help you create professional presentations.

Main Features:

  • You can run the presentation slideshow at any time and control the slideshow with hotkeys.
  • It provides a Custom Slideshow feature that allows you to run a slideshow with particular slides of a presentation.
  • You can also use the Rehearse Timing function to practice a presentation.
  • A lot of slide transition effects like box, bar, shape, 3D Venetian,  honeycomb, newsflash, wipe, wheel, turn around, rochade, etc., are also provided in it. You can apply these transitions to slides and run a slideshow.
  • It also provides several animation effects to apply to key elements of a slide.

Additional Features:

  • It lets you encrypt your presentations.
  • This software comes in a portable package too.


It is one of the best free open source PowerPoint viewer that also lets you create and edit presentations of almost all formats.

OpenOffice Impress

OpenOffice Impress is another free open source PowerPoint viewer software for Windows, Mac, and Linux. It is a part of the famous Apache OpenOffice that also offers other office software including OpenOffice Calc, OpenOffice Draw, OpenOffice Writer, etc.

In OpenOffice Impress, you can view presentations in a variety of formats. Some of these formats include Microsoft PowerPoint (PPT, PPTX, PPS, etc.), Uniform Office Format Presentation, ODF Presentation, and more. It provides various view and editing features that let you work on a presentation file. Furthermore, you get Outline, Notes, Handout, and Slide Sorter tabs to manage respective sections of a presentation. Now, let us see more of its key features.

Key Features:

  • To show your presentation, you can run a full-screen slideshow and lets you adjust various properties of the slideshow.
  • It enables you to customize slide transitions and respective speed, sound, and other settings.
  • You can also animate separate objects of a slide.
  • It lets you format the content of a slide using options like font, slide layout, background, character formatting, paragraph formatting, bullets & numbering, etc.


It is a great free open source PowerPoint viewer that allows you to view, edit, or create presentations of different formats.

ONLYOFFICE Desktop Editors

ONLYOFFICE Desktop Editors is yet another free open source PowerPoint viewer for Windows, Linux, Mac, and other operating systems. It is primarily an office suite that is used to process documents, presentations, and spreadsheets. It comes with different modules for the same. To view a presentation file, you need to use its Presentation module. In it, you can view presentations of PPTX, PPS, ODP, and a few more formats. It provides all the required tools to view presentations. Plus, you can also use it to create presentations from scratch or to edit an existing presentation. N0w, let us check out its key features.

Note: You can access its source code from this web page.

Main Features:

  • Slideshow: It lets you start a fullscreen slideshow of your presentation with playback control options. You can use hotkeys to move to next or previous slide or to play or pause the slideshow.
  • Transition Effects: You can apply different transition effects between two slides while customizing settings like duration, delay, etc.
  • Format: It allows you to customize slide layout, change slide theme, and apply different formatting to the presentation text.
  • Collaborate: It lets you collaborate with your colleagues using your ONLYOFFICE, Nextcloud, ownCloud, and other cloud accounts.

Additional Features:

  • Plugins: It offers multiple additional tools that may come in handy to you, such as Photo Editor, Clipart, Translator, Thesaurus, Symbol Table, YouTube, etc.


It is another nice open source PowerPoint viewer and editor which also lets you view other types of files including documents and spreadsheets.

OxygenOffice Professional - Office Suite

OxygenOffice Professional – Office Suite, as the name suggests, is an open source office suite that lets you view PowerPoint presentations. It comes with different office applications one of which is OpenOffice.org Impress. Using this application, you can open and view presentations. It supports formats like PPT, PPTX, PPTM, PPS, ODP, and more to view a presentation file. Apart from that, as it is a presentation software, you can also design new presentations using it.

This office suite also includes applications like OpenOffice.org Calc, OpenOffice.org Writer, OpenOffice.org DrawOpenOffice.org Math, etc. These are used to process files of different types like documents, spreadsheets, drawings, etc. Let us now see the main features of its open source presentation viewer module.

Main Features:

  • It allows you to run a slideshow of your presentation in fullscreen. You can easily control the slideshows using your mouse or keyboard.
  • You can set up various configurations of a slideshow including slide range, type of slideshow (window/ fullscreen), etc.
  • During the slideshow, you can make mouse pointer visible, enable mouse pointer as pen, make navigator visible on screen, etc.
  • It also lets you edit slide layout, format content accordingly, apply desired slide transition, add custom animation, and do more.


It is another office suite that provides you an open source PowerPoint viewer using which you can view presentations of a good number of formats.

Related Posts
Write a Comment

Komal Srivastava

Technical Content Editor

About Us

Sample image

We are the team behind some of the most popular tech blogs, like: I LoveFree Software and Windows 8 Freeware.

More About Us