Open winmail.dat files

On the go!

Full winmail.dat-viewing power on the go!

Sometimes work follows you around, even when you don’t have a fully equipped office with you. Fortunately, smartphones offer a great way to stay in the loop. Keep the workflow smooth with Letter Opener’s winmail.dat-viewing power.

The free version lets you check the contents of an email until you get back to the office.

An in-app purchase lets you open attached files on your phone.

Available from App Store. Just click to Try Now.

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What’s in a Winmail.dat file?

An email message from Microsoft Outlook.

What is a ZIP file?

A ZIP file may contain one or more compressed files or directories.


It just works. I have been using this app for years. Opens up when needed and quickly converts .dat files. Highly recommended!

Perfect · Always opens PC to Mac attachments! Very useful for our firm’s technology mix.

Very easy to use, opens winmail.dat attachments effortlessly to recover attachments within
Mr. Zinc

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Letter Opener for macOS

Open Winmail.dat, MSG and XPS files with just one double-click!

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Letter Opener for macOS Mail

Seamlessly and automatically converts winmail.dat files right inside your macOS Mail application.

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