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Winmail.dat was created by Tobias Reinhardt. Users can open annoying “winmail.dat” attachments with the help of the free program called Opener. The in-app purchase will remove adverts even though the free version is still fully functioning.

Users of iOS and Android devices can download Winmail.dat Opener. People who still use older versions of Microsoft Outlook apps will find Winmail.dat Opener to be very helpful and convenient as many e-mail clients do not handle rich-text message contents and attachments from these versions.

Winmail.dat Opener

Developer: Tobias Reinhardt

Price: Free

Rating: 4.1

Available version: 1.0.3

How to uninstall the application:

  1. Go into your settings
  2. Go into the Applications Manager
  3. Uninstall the Winmail.dat app by selecting it and clicking Uninstall.


  • This software is a mobile application that will not modify the system settings of your phone.
  • We provide the official Apple Store download link.
  • All apk downloads obtained from our website are 100% safe.
  • There are no trademarks or logos belonging to their respective owners on the website. None of them are connected to or associated with this website.
  • Our website and its content comply with all Google Ads Advertising guidelines and Google Unwanted Software policy standards and restrictions.


  • Without an Internet connection, this program will extract the winmail.dat file from your phone or tablet. Although the actual extraction procedure does not require an Internet connection, because our program is ad-supported, it must request permission to access the Internet.
  • Please be aware that not all files with a.dat extension are winmail.dat files. Therefore, please verify that your file is a winmail.dat file and not one of a hundred alternative file types with a.dat extension before leaving a one-star review complaining that our service didn’t work.


I used three free winmail openers, but none of them could access the winmail attachment. This is the only one I found that was successful in doing that. Just what I needed, many thanks. Additionally, if you just use it sometimes to download one file, the advertising are irrelevant. Once more, thank you for developing a program that works as advertised!

Winmaildat Opener runs flawlessly on an iPad Air 1st Gen running iOS 9.3.5 and *totally* accomplishes the task at hand. Making the choice to donate 99 cents to the app’s creator rather than use it for free while watching advertisements was simple. It’s a great deal that’s priceless. Good work. Thanks for a wonderful, user-friendly product!