Open a Microsoft Project file on an iPhone or iPad

Microsoft never made Project for iPhone or iPad, and tapping an .mpp attachment in Mail just shows a blank icon. Here's how to read the plan in Safari.

Open your .mpp file Free Gantt chart and task table. No sign-up.

Open it in Safari

In Mail, press and hold the .mpp attachment and choose Save to Files. (From Outlook or Teams, use Share, then Save to Files.)
Open the MPP Viewer in Safari.
Tap the page, choose Choose File, and pick the file you saved.

You get the Gantt chart, the task table with WBS numbers, durations, dates, progress and predecessors, and the resource list, free. On an iPad, turn it sideways for a wider Gantt chart.

Why it won't open on its own

An .mpp file is Microsoft Project's own format, and Project only runs on Windows. Excel, Numbers and the Files app can't read it. Microsoft's web planning tools need a paid plan and are built for plans made in them, not for opening an .mpp someone sent you.

Need to send it on?

From the viewer you can export the plan as an Excel file, a CSV for Numbers or Google Sheets, or a PDF Gantt chart you can share from your phone. Exports are $19 once for every project you open, with no subscription.

Open your .mpp file Free Gantt chart and task table. No sign-up.

Microsoft Project is a trademark of Microsoft. I am not affiliated with Microsoft.