See the whole plan
Browse WBS hierarchy, dates, duration, completion and milestones in one synchronized view.
No signup · No installation
Free MPP Viewer Online
Open Microsoft Project files instantly. Review tasks, dates, progress and the full Gantt timeline right in your browser.
Deleted immediately after parsingYour MPP file is sent to our parser only to build the view. The temporary upload is deleted immediately after parsing, and closing this page clears the displayed project data from your browser.
IDTask nameStartFinishDuration%
AugustSeptemberOctoberNovemberDecemberJanuary 2027February 2027March 2027April 2027
M31M7M14M21M28M5M12M19M26M2M9M16M23M30M7M14M21M28M4M11M18M25M1M8M15M22M1M8M15M22M29M5M12
1Website RedesignSep 2, 2026Oct 14, 202631 days42%
2Discovery & PlanningSep 2, 2026Sep 10, 20267 days100%
3Stakeholder interviewsSep 2, 2026Sep 5, 20264 days100%
4Requirements sign-offSep 10, 2026Sep 10, 20260 days100%
5DesignSep 11, 2026Sep 24, 202610 days55%
6WireframesSep 11, 2026Sep 16, 20264 days100%
7Visual designSep 17, 2026Sep 24, 20266 days30%
8DevelopmentSep 25, 2026Oct 9, 202611 days10%
9LaunchOct 14, 2026Oct 14, 20260 days0%
LegendTaskSummary taskProject summaryCritical taskMilestoneResource names appear in black beside task bars
Temporary processing
Your file is sent to our parser only to create the view, then the temporary upload is deleted immediately.
Works anywhere
No Microsoft Project license, account or software installation required.
Open MPP files online without Microsoft Project
FormatPeek is a free Microsoft Project viewer for .mpp files. Drop in an MPP project file to inspect its task hierarchy, start and finish dates, durations, progress, predecessors and assigned resources directly in your browser.
How to view an MPP file
- Drop your MPP file into the upload box, or click the box to choose it.
- Wait while the temporary file is parsed and the project view is prepared.
- Switch between the Gantt chart, task, resource, usage, network and calendar views.
The viewer does not edit or save changes to your original MPP file.
What you can view
- Interactive Gantt chart and milestones
- Task sheet, WBS and dependencies
- Task usage and resource assignments
- Calendar and network diagram views
Private and convenient
- No Microsoft Project installation
- No account or signup
- Uploaded files deleted after parsing
- Works on Windows, Mac and modern browsers
Limits and compatibility
- Files must use the .mpp extension and be no larger than 30 MB.
- Password-protected, incomplete or damaged files may not open.
- Some custom fields, formatting and release-specific features may display differently from Microsoft Project.
- XML, MPX, XLSX and PDF files are different formats and cannot be uploaded as MPP files.
Review the MPP compatibility notes or use the troubleshooting guide if a project will not open.
MPP viewer FAQ
What is an MPP file?
An MPP file is a project plan created by Microsoft Project. It can contain tasks, dates, dependencies, milestones, resources and progress information. Learn more about what an MPP file is.
How can I open an MPP file without Microsoft Project?
Upload the file above to view it in your browser. You do not need Microsoft Project or an account. See the complete guide to opening MPP files.
Does this MPP viewer work on Mac?
Yes. FormatPeek runs in a modern web browser, so it works on macOS, Windows and Linux without installing desktop software.
Is my MPP file stored?
The file is sent to our parser only to create the requested view. The temporary upload is deleted immediately after parsing and is not added to an account or file library. Closing the page clears the displayed project data from your browser.