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 to 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 redo the whole thing on Excel instead. There must be a solution.
Use Office Timeline! Simply import your MS Project file and begin editing.
Open .mpp file with these 6 MS Project alternatives
An online tool that allows you to open MS Project MPP Plans from cloud locations like OneDrive, Google Drive, Basecamp, Dropbox, SharePoint Online, Box, URL Links, and email attachments
With ProjectManager.com, you can import and export Microsoft Project files without losing any data. You can view and edit .mpp files before exporting your changes and sharing them with your colleagues. Best of all, the software works on both windows and mac computers, without requiring any downloads.
Gantter is a web-based project management tool with 30 days of the free trial very similar to how MS Project works.
One of the latest features 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, import the .mpp Project file that we’ve created, and viewed 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 free within 30 days.
This tool can be used to launch Microsoft Project MPP files from your network, device, intranet, or cloud location.
Compatible with MS Project 2019, 2016, 2013, 2010, 2007, 2003, and earlier versions.
Watch this video on how to open MS Project files without Project installed.
Our preferred tool of all is Office Timeline!
Office Timeline – Turn Complex Data into Clear, Impactful Visuals
Key Highlights:
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Fast & Intuitive Timeline Creation: Build professional timelines, Gantt charts, swimlane diagrams, and roadmaps in minutes—no design skills needed
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Seamless PowerPoint Integration: Power up your presentations directly from within PowerPoint with the Office Timeline add-in for Windows.
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Flexible Web App: Prefer working online? Office Timeline Online lets you create, share, and collaborate from any browser—Windows or Mac
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Efficient Data Imports & Updates: Use existing project data—Excel, MS Project, Smartsheet, Jira, Google Docs/Slides—and refresh visuals on the fly
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Visually Rich Templates & Themes: Choose from ready-made, customizable templates with swimlanes, sub-swimlanes, dependencies, multiple timescales, and branding elements
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Scalable for Teams & Enterprises: Trusted by over 130,000 project managers worldwide and rated 4.2/5 on Trustpilot across 5,500+ reviews
Why It Matters:
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Communicate Clearly: Simplify complex plans into single-slide visuals that resonate with executives and stakeholders
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Save Precious Time: Manual timeline building becomes obsolete—drag-and-drop editing and pre-built templates streamline the process
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Stay Agile: Easily adjust project schedules, update milestones, and realign swimlanes—keeping everyone on the same page.
Professional Tiers & Trial Options:
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Free Version: Perfect for starters—create basic timelines in PowerPoint or the web app.
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Pro / Pro+ / Expert Plans: Unlock advanced features like sub-swimlanes, multi-timescale views, enhanced styling, and data refresh capabilities.
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14-Day Free Trial: Test full capabilities before committing.
In summary: If you’re seeking a quick, elegant and effective way to transform project data into shareable visuals, Office Timeline offers the perfect mix of simplicity, power, and collaboration—whether you’re working solo or across teams.
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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 on any that you stumble upon.