Open Winmail.dat - File Opener 4+

Easily open winmail.dat files

Rocky Sand Studio Ltd.

    • 3.4 • 69 Ratings
    • $6.99



Open Winmail.dat helps you to quickly view the content of winmail.dat files.

Winmail.dat files contain formatting information for messages that use Microsoft's proprietary TNEF standard and any attachments sent with the original message.

Winmail.dat files are attached to email messages sent from older versions of Microsoft email apps, like Outlook or Microsoft Exchange. The attachment doesn't appear in the sending app, but it appears in Mail.

- Simply open winmail.dat files with a click
- Drag and drop winmail.dat files to the app icon for convenient use
- Menu bar support, hide Dock icon

We'd like to know how to improve our apps, contact us at Rocky Sand Studio

What’s New

Version 2.1.1

[fixed] Minor bugs

Ratings and Reviews

3.4 out of 5
69 Ratings

69 Ratings

Paintern ,

It worked!

I was able to open a .dat file, and see it in Preview

Aragon52 ,

Awesome Application for Opening .dat files

Could not be better or easier. Takes all of the frustration away from opening those darn .dat files on your Mac.

Aniuska32 ,

Great App,easy to use.

Super easy to use once you figure it out, you just drag and drop your winmail file and voila!, it’s open. worth the money! I highly recommended it.

App Privacy

The developer, Rocky Sand Studio Ltd., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.