Absolutely Free MPP Viewer That Runs On Windows, Linux and Mac OS – Microsoft Project Plan Viewer

MOOS Project Viewer is a free MS Project viewer application that allows you to open, view and print any MS Project file (MPP, MPT formats). Best thing about MOOS Project Viewer is that is can run on any Java enabled platform. This includes the three major operating systems Windows, Mac OS X and Linux. This is an ideal Free alternative to ProjectReader commercial Software which is pricy.

All it requires is that you have Java Runtime Environment on your computer which can be downloaded for free from here.


  • Open any and all Microsoft Project files (mpp, mpt, xml) and Microsoft Project versions (2000, 2003, 2007, 2010)

  • No need to have MS Project installed on your computer

  • Easy to use interface (easier that with Microsoft Project)

  • Available views: Gantt Chart, Task Usage, Resource Sheet, Resource Usage, Tracking Gantt

  • Print any view

  • Wide Gantt chart timescale range (from minutes to years)

  • Show critical path, deadlines and baselines in Gantt chart

  • Show/hide, arrange and resize columns per view and keep settings

  • Running on multiple platforms (Windows – 2000, 2003, XP, Vista, Windows 7; Mac OS X; Linux)

  • 24 hours support

Download MOOS Project Viewer for Free – Here.

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  1. Denis says:

    If you need just open Project file, you do not need to install any software. Just go on http://www.amiproject.com and open it in browser.
    You can also share your Project file with people who do not have Microsoft Project installed. Just upload it on http://www.amiproject.com and click File/Share to get a short link you can share.

    • OpenTube says:

      Great Denis, Thanks for mentioning.

    • Mike says:

      This may not work for projects that have proprietary information. The company I work for has non-disclosure agreements with everyone under the sun. I feel much more comfortable opening them on my computer alone using an application. Thanks for doing this OpenTube!

  2. shivanand says:

    Thanks for this post, I was for a long time looking for a MPP viewer on MAC.

  3. Here’s a Project Viewer that is the best. I use ValleySpeak Project Server http://www.valleyspeak.com

    This allows me to continue using Microsoft Project as my project management tool of choice, while give my team members a easy browser access to publish, execute and control projects in real time.

  4. Great Blog,I was for a long time looking for a MPP viewer on MAC.

  5. […] Absolutely Free MPP Viewer That Runs On Windows, Linux and Mac OS – Microsoft Project Plan Viewer […]

  6. aussiejd says:

    Hmm. The website says this product is only free fro 30 days…

  7. DK says:

    MOOS Project Viewer appears to be commercial now with 30 days trial. I’ve used OpenProj in the past that is actually a full MS project-compatible editor, but I’ve run into compatibility issues with it. Also, OpenProj has not been updated since 2008. I’ve found free RationalPlan Viewer http://www.rationalplan.com/download.php and will use it for the time being.

  8. Jose Lourenco says:

    Apparently MOOS keeps a free “Project Viewer Light” at http://www.free-project-viewer.com/.

    Incidently I couldn’t install it on a Debian 6 machine but could just be an occasional issue and I didn’t retry.

  9. Notfree says:


  10. Aa says:

    Thanks a lot.
    it works perfectly!!!

  11. cp says:

    absolutely free??!!?!?? sorry no, my quest continues

  12. Dur says:

    FREE…. for 30 days….. weak sauce

  13. Tiberiu Ghioca says:

    Starting with version 1.0 MOOS Project Viewer was not free anymore as many powerful features were added. However all prior versions are free.

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