Winmail.dat Opener

Trusted Badge

1. Appurse use a trusted and verified digital signature.

2. The downloadable file is original and safe.

3. The file has not been modified in any way.

Developed by Tobias Reinhardt, Winmail.dat Opener is a free app allowing users to open pesky 'winmail.dat' attachments. The free version is fully functional, but if you can not stand the ads, the in-app-purchase will remove ads.

Winmail.dat Opener is available for both Android and iOS users. Since many e-mail clients do not support rich-text message contents and attachments from older versions of Microsoft Outlook applications, people who still use these versions will find Winmail.dat Opener very useful and convenient.

  • Price: Free
  • Version: 1.10
  • Category: Tools
  • Developer:Tobias Reinhardt
Average User Rating:
4.9 (1,746 votes)

Uninstall the app:

1. Go to Settings menu;

2. Choose Apps or Application manager;

3. Touch the app you want to remove;

4. Press Uninstall.

About Winmail.dat File

The winmail.dat file contains Rich Text Format information for the message but usually cannot be opened by the normal e-mail clients. Winmail.dat files are in fact called T.N.E.F. files (Transport Neutral Encapsulation Format). Microsoft Outlook e-mail for Windows send e-mails in TNEF format, but most other e-mail clients or applications do not understand TNEF. The app will extract the winmail.dat file on your device, then you can preview, resend or print or save them.

How to Open Winmail.dat Files ?

Normally, you just need to open the context menu of the winmail.dat attachment in your email client, then select "Winmail.dat Opener". But if you cannot find "Winmail.dat Opener" in the context menu., you can turn to the second method. By saving the winmail.dat attachment on your phone and starting the "Winmail.dat Opener" app afterward, you can then select the previously saved file successfully.


Please do note that not every file ending with ".dat" is a winmail.dat file. There are also many other file formats which also ends with the .dat extension. Winmail.dat Opener cannot open a file that's not actually winmail.dat file.


1. All content is original. The copyright of all app reviews and images belongs to our editorial team, copying without attribution is forbidden.

2. All the information on this website is strictly observed all the terms and conditions of Google Ads Advertising policies and Google Unwanted Software policy

3. We guarantee the security of apk files downloaded from our site and also provide the official download link at Google Play Store.

Besides, the app you're reading right now:

1. is a mobile app;

2. will not change any system settings on your phone.

Related Apps

Editor's Choice