How to open and view .mpp file without MS Project installed
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Recently we’ve been working on a few project which requires us to utilize Microsoft Project for project planning and scheduling purposes.
Once the plan(.mpp file) was completed, we then sent it out via email for all project stakeholders to view and comment on.
Within 10 minutes later, one partner replied the email saying:
Dude, I don’t have MS Project installed on my machine! Any other way for me to view this project plan?
From what I know, Microsoft has a Word Viewer, Excel Viewer, Powerpoint Viewer for people to download online for free. But as for MS Project, this is what I found out when I did a search for this phrase “view microsoft project files online”

So it’s confirmed, no viewer program for Project files made available by Microsoft. You’ll need to have at least Microsoft Office Project 2003 installed.
We’ve spent so much time developing the project plan via MS Project, we can’t afford to re do the whole thing on Excel instead. There must be a solution.
Here I will reveal four solutions on how to open and view .mpp file without MS Project installed on your machine.
SOLUTION #1 – Gantter.com
Gantter is a free (gratis) web-based project management tool very similar to how MS Project works.
One of the latest feature of Gantter is its ability to import .MPP files. This means that the partner that initially had trouble viewing the project plan can now head to Gantter.com, import the .mpp Project file that we’ve created and view it online. That’s right, nothing to install. Just upload, and begin to view and even edit the file.
If you have past experience using MS Project, then using Gantter will be really easy for you. And you might just notice that with Gantter you cant easily drag and drop tasks around and also perform copy and paste like how it’s possible within Microsoft Project. This is because Gantter is web based as compared to MS Project which is a desktop application.
But if all you need is to create simple project plans, I don’t see why you will need to purchase MS Project since Gantter has most of the available features you could use for free.
Since Gantter is provided free of charge, there’s really nothing much to complain about. I would like to personally take this opportunity to thank the author of Gantter for making this web based online project tool available to the public for free.
SOLUTION #2 – Project Viewer Central
Project Viewer Central is a desktop application which allows you to view MS Project files for your PC withot MS Project installed. The trial version is available for download.
SOLUTION #3 – Kadonk LiveProject
LiveProject is a free standalone .MPP Viewer application for Microsoft Project files. It enables users to view Gantt charts, tasks, resources and other Microsoft Project information, without the need to install Microsoft Project.
SOLUTION #4 – RationalPlan Viewer
RationalPlan Viewer is also a MS Project viewer as well with the aim to provide project stakeholders a chance to view the project files for free. The RationalPlan Viewer, a near 10 MB download is a desktop application which works on Mac OS X, Windows and Linux.
SOLUTION #5 – Projec.to Online MS Project Viewer
Projec.to is an online application which allows you to view and share .mpp files online
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I believe there are a few other MS Project viewers available out there in the market. Do feel free to update us any any that you stumble upon. Thanks.
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8 Responses to 'How to open and view .mpp file without MS Project installed'
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Steelray Software’s Microsoft Project Viewer is also a desktop application with very interesting, easy features. Customer service is responsive. Good product.
We use LiveProject, also a free viewer which has a bunch of great features.
We found another interesting option for free viewer of MPP files. This is ganttzilla online service. It also has collaboration and versioning features around Project Plans.
Open Project is also free and does a great job of viewing and manipulating MPP files and then exporting Microsoft Project XML files.
http://www.amiproject.com is another free web-based MPP files viewer
You can also try MOOS Project Viewer:
http://www.ms-project-viewer.com
It is free.
I use Valleyspeak project server and its an excellent Microsoft project viewer which allows the Project Manager to get real-time updates about the project status from their teams.
http://www.valleyspeak.com/index.php/product/features/
If you need a tool to manage your software development projects,
I can reccommend
http://www.ganttzilla.com
It includes complete set of features for web-based creation, editing, viewing, discussing, versioning, secured sharing and publishing of project plans.
It’s free!