WinDat Opener 4+

Alexander McGuffog

    • 3.5 • 2 Ratings
    • $6.99



· Works with any email client. Just drag-and-drop winmail.dat files from anywhere
· Highest rated winmail.dat decoder on the app store
· Extracts all attachments from winmail.dat files
· Extracts embedded appointment (iCal) and contact (vCard) data
· Dark mode support
· macOS Sonoma compatible

WinDat Opener opens the "winmail.dat" email attachments that are sometimes sent by Outlook and Outlook Express email clients. These files are in “TNEF” format, and usually contain attachments such as spreadsheets or presentations embedded within them. WinDat Opener extracts the embedded attachments hidden inside the winmail.dat file, allowing you to open them with another application, e.g., Pages.

WinDat Opener is simple to use - it integrates transparently with macOS. All you have to do is to either drag-and-drop the winmail.dat file onto WinDat Opener, or just double-click the file. WinDat Opener then extracts the embedded attachments, allowing you to save them, or to open them in another application. WinDat Opener automatically preserves important file metadata such as file creation and modification times.

What’s New

Version 2.4.7

Optimized for macOS 14 Sonoma

Ratings and Reviews

3.5 out of 5
2 Ratings

2 Ratings

Runner1405 ,

Happy Customer

I am a contractor who gets windat files from other contractors, and on an Apple computer is not possible to open. I needed to give a quote to this contractor who sent me some windat coded files and I went to the app store and found this program. I downloaded it and it worked as it was advertised. I was able to open the files and get a quote back to my customer right away. I would highly recommend this app to any Apple users out there who have had this probem in the past. I only wish I would have found this sooner. Good Job!

jraym ,

Works Flawlessly, Highly Recommend

I had previously downloaded TNEF's Enough program to view .dat winmail files, but it was completely worthless. I took the plunge on this app and it worked perfectly!

melPAI ,

Used to love it and now it doesn’t work

This was my go-to app for emails from an important client. With the new update for the computer (El Capitian) it crashes on launch EVERY TIME. I have updated it to the newest version, up to date on all updates but it still crashes. I have consulted the website and it doesn’t help me at all. I would like to use this but it doesn’t appear to want to work. If it worked I’d give it 5 starts but because it just crashes I can’t do that. HELP!!

App Privacy

The developer, Alexander McGuffog, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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