Winmail.dat, MSG, MHT Viewer

12.7K reviews
Content rating
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About this app

Open 📎 Winmail.dat, MSG, EML and MHT files easily and securely

Letter Opener has always been the perfect app to open Winmail.dat and MSG e-mail files—the format used by Microsoft Outlook and Exchange—and also internet standard EML email files. And it’s even easier and more secure with Letter Opener for Android. Your files are never transferred or shared when you use Letter Opener, and your files and content stays protected on your device.

Privacy and security

Privacy and security aren’t just something you should hope for—they’re something you should expect. That’s why we never transfer or shared your files. Everything is done on your trusted device. Your emails stay your business.

Supported file types:

• winmail.dat or AT00001.dat
• Outlook messages: .MSG
• Outlook templates: .OFT
• E-Mail files: .EML, .EMLX
• Web archive files: .MHT, .MHTM, .MHTML

Made with a special 😤 for winmail.dat files.
Updated on
Nov 4, 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity and App info and performance
Data is encrypted in transit
Data can’t be deleted
12.7K reviews
Piero Violonchi
September 27, 2022
I downloaded this application to be able to unwrap *.dat files that mobile Outlook shows as email attachments. This app unwrapped the *.dat file in one of my emails. However, it did not keep the original format of the actual attached file. The *.dat contained an *.ics file (a calendar file) and calendar information were not the same as my Outlook client on my PC. I suspect that this app must have not kept the proper information format after it unwrapped the file.
9 people found this review helpful
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Meagan Tognella
September 20, 2022
Absolutely fantastic! I had been struggling to find a reliable application to assist me with accessing .msg files on my android device. Thankfully, I found this app and it worked immediately with no problems whatsoever. Very pleased and impressed! 🌟
8 people found this review helpful
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Freddie Bustria
August 14, 2022
Works fine and opened quickly on my Samsung Note 10. Not sure why the negative reviews state otherwise? It is the ONLY one that worked and opened a windat file. I tried others before this one and they did not work. Maybe people are confusing this outstanding windat file letter opener with others. Try it you will like it♡
10 people found this review helpful
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What's new

Initial Release 🎉