mpp-open

Open an MPP file without Microsoft Project

Drop an .mpp file here to see its tasks, its Gantt chart, resources and calendars. The file never leaves your browser.

What you get, free

  • the task list: ID, WBS, name, duration, start, finish, predecessors, % complete and resource names, with summary tasks indented as in Project;
  • the Gantt chart, with summary bars, milestones, progress and the links between tasks;
  • resources, assignments and the working calendars with their exceptions;
  • a CSV of the task list that opens in Excel, Numbers or Google Sheets;
  • your browser's own print, which can save the chart and the table as a PDF.

It reads .mpp files from Microsoft Project 98 onwards, .mpt templates and .mpx files. Project 2010 and every later version, including 2021, 2024 and Microsoft 365, save the same .mpp format. Project XML (.xml) files are not read yet.

Nothing is uploaded

The file is read by code running in this browser tab. It is not uploaded: the page's security policy lets it send requests to this site only, and the two it sends count a page view and the file's format, never its content or name.

That matters when the plan is a client's and comes with a confidentiality clause: most free online viewers convert the file on their own server. Why this one does not need to, and how to check it: why your schedule never leaves your browser.

Who it is for

People sent a Microsoft Project file who do not have Project: contractors, consultants, clients, and anyone on a Mac, a Chromebook or a phone. Microsoft Project runs only on Windows, and each person who uses it needs a licence.

Questions

Is my file uploaded?

No. The file is read in a Web Worker in this tab by MPXJ, an open-source Project file reader compiled to JavaScript. The page's Content-Security-Policy allows requests to this site only, and none of them carries the file. You can check in your browser's developer tools: dropping a file adds no request with its content.

Which versions of Microsoft Project can it open?

It reads .mpp files from Microsoft Project 98 onwards, .mpt templates and .mpx files. Project 2010 and every later version, including 2021, 2024 and Microsoft 365, save the same .mpp format. Project XML (.xml) files are not read yet. It was tested on files saved by Project 98, 2003, 2007, 2010, 2013, 2016 and 2019, from MPXJ's own test suite.

What if the file is password-protected?

It says so and stops. A password-protected .mpp cannot be read without Project; ask the sender for a copy saved without a password.

Can I edit the plan?

No. It is a viewer: it shows the schedule as saved and does not recalculate it or write .mpp files.

Is it free?

Viewing, printing and the CSV export are free, with no account and no limit on the number of files. A laid-out Gantt PDF (page size, date range, columns) and an Excel workbook are not built yet; the export page says what they would be and counts who wants them.

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Not affiliated with Microsoft. Microsoft and Microsoft Project are trademarks of Microsoft Corporation.