Winmail.dat Viewer - Letter Opener 9

Developer: Atlan Creative GmbH

Current Version: 9.2.1

Last Updated: 9 months ago

Download Size: 12.4 MB - Download


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

Try all in-app purchases 14 days for free!

A winmail.dat file is an email from Microsoft Outlook that can not be read by other email applications. It needs to be converted for the content to be accessible.

Letter Opener does that with a simple double-click!

With 10 years experience (and a special dislike for winmail.dat files) we made sure that working together with Microsoft Outlook and Windows users can be simple and seamless.

- Open winmail.dat and MSG files and convert Microsoft Outlook appointments, notes, contacts etc. to macOS native formats.

- Convert Microsoft XPS documents to Adobe PDF files

- Quickly view the contents of a Winmail.dat, MSG and XPS file with a tap on your space-bar via Quick Look

- Once extracted, files can be treated like any other file on your computer

Letter Opener speaks your language! It’s fully localized in Arabic, Chinese, Dutch, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Spanish and Swedish.

- Winmail.dat Premium: Access to attachments in winmail.dat files
- MSG Premium: Access to attachments in MSG files
- XPS Premium: Convert XPS files to PDF files
- File Extension Premium: Fix files with the wrong or no extension

The trial allows you to use all premium-features 14 days for free! After the trial period you can keep reading message text. The premium add-ons can conveniently be purchased individually.

We provide direct personal support, so don’t hesitate to contact us if you have any questions or comments: [email protected]

Thanks for helping us to keep improving Letter Opener!


Release Notes:

- Improvements
- Added localizations
- Bug fixes

If you encounter any problems or have questions please go to Help > Feedback Assistant to send a report or contact us via email: [email protected]

Please consider writing a short review or to rate Letter Opener. Thank you!


Most Helpful Reviews

Version 1.0.0
Review by Joel McIntosh

A Great Tool For Opening the Occasional winmail.dat File - This app does exactly what I wanted. On rare occasions, I get a winmail.dat file attached to e-mail from a PC user. I save the attachment to my desktop, open it with this application, and boom ... I can open the attachment in the appropriate Mac application. It works great. Unlike some other reviewers, I do not want a plugin. I don't want to install a Mail bundle (and the trouble that spells every time Apple updates that is always installed on my system for the few times I encounter winmail.dat files

Found helpful by 8 out of 8 people
Version 3.0.1
Review by qwijiboj

Does nothing of value other than telling you to buy the full version. - Pretty sure the positive reviews for this were manufactured by the software company, as this application does nothing and simply displays “buy the pro version” for it to actually do anything.

Found helpful by 32 out of 33 people

More Reviews for Current Version

Version 9.2.1
Review by Lynnwa25

works great for me - i have a Mac I and I couldn’t open any windat files.. Yes, I had to pay the fee to get the full version, but its worth every penny and it wasn’t that spendy. My only beef is that I cant open on my iPhone unless i go through a few screens. Its awesome the ipad version works good too..

Found helpful by 2 out of 3 people
Version 9.2.1
Review by LeahDeePDX

Perfect! - I’ve never had a problem with this app. I use it on all of my devices for opening pesky winmail.dat - SO worth the price!

Found helpful by 1 out of 1 people
Version 9.2.1
Review by The Faj

Letter Opener is a life saver. - I had been searching forever for at least one app that would make Winmail.dat files just work on the Mac. I almost had to go back to using a Windows machine. :-O LetterOpener does the trick. If I could give it six stars I would! The best just keeps getting better!

Found helpful by 1 out of 1 people
Version 9.2.1
Review by jeffinlv

Just take the money and leave me alone. - would be great if I could get it to stop nagging me to write a review every time I open a winmail attachment. have to click through, let it opent the App Store, then close the App Store befoere I can work with the attachment. $9.99 of my money should be enough not to have to deal with this; it’s not like its a free app or a trial version. very frustrated.

Found helpful by 1 out of 2 people
Version 9.2.1
Review by KES60

Exactly what I needed - Love it. Takes care of all the letter opening I need!

Found helpful by 1 out of 1 people