Winmail File Viewer – No.1 app to open winmail.dat files on the App Store! Now updated for iOS 13 and the latest iPhones and iPads.

If this app does not open your winmail.dat file, or you have any questions, doubts, or suggestions, then please contact us using the support link.

Need a winmail.dat file opener, viewer, extractor? This is the app for you.

FAQs –

1 - Why doesn’t this app work for me?

Make sure it is a winmail.dat file that you are trying to open with this app!

a) Files such as just a .dat (not winmail.dat) are special data files (hence the name!), and only the software which created them can open them. They can’t be opened using this app.
b) A .wmv file is NOT a winmail.dat file, even though it looks similar! It’s a ‘Windows Media Video’ file which can’t be opened with this app.
c) An ‘Untitled Attachment’ or a ‘MIME’ file or an ‘.eml’ file is NOT a winmail.dat file, and this app should not be used to open this type of file.

Also be sure to check that your file has downloaded completely on your iPhone/iPad. Sometimes large files with sizes in MB take time to get downloaded, especially if you are on a slow WiFi network.
(App will only work on fully downloaded winmail.dat files.)

If it still does not work, then re-starting your iPhone or iPad might do the job. And if nothing helps then contact us via our support page.

2 - Why does the app show 'This is not a TNEF file'?

Around 99% of winmail.dat files are created using TNEF encoding, and all the 'winmail' apps and software are able to open only these types of winmail.dat files.
The solution to open non-TNEF winmail.dat file has not yet been found, though I am working on it and hopefully should be able to include it in the next app update.

3 - How do I open / view / edit the files which are contained inside my winmail.dat file?

This app will ONLY open the winmail.dat attachment, but for any file contained inside the winmail file you will either need the functions/default apps of your iPhone or iPad OR you'll need to install other apps to open Word, Excel, PDF, large Image files, zipped files, Audio and Video files.
The Winmail File Viewer app is a simple app to open winmail.dat (TNEF encoded) files, so please don’t expect it to do anything more.

4 - Why do I get a ‘Blank page’ when I open the winmail.dat file using your app?

Sometimes there is absolutely nothing inside a winmail.dat file except some kind of formatting, fonts, AVG virus scanner info, voting buttons, email read receipts etc. So, if you get a blank page after opening the winmail.dat file please don’t worry because there is nothing wrong with the app. Still, if you need assistance you can contact us.

5 - Are there any new features planned for this app in the future?

Yes, we will be adding lots of new features and functionality to this app in the future, so please keep using it!

Kindly give good ratings and reviews if you like this app. Thank you. :)


Versione 2.7

- Fix visual bugs in iOS 13

Valutazioni e recensioni

4.0 su 5
7 valutazioni

7 valutazioni

ItalianHunk101 ,

Top app iPad

Questa applicazione è estremamente semplice, ma così utile che è l'applicazione più in alto sul mio iPad. Io lo uso tutti i giorni....

GentileAcey ,


Sicuramente l'app migliore Winmail

Ikinis ,


Apre istantaneamente questo formato di files. Finalmente. Per chi non riesce ad aprirli deve cliccare bene e SOLO sulla bustina prima della scritta..... Winmail. Dat proprio sul disegnino dell'allegato maledetto!! Provate....😊


Pham Pham
39.5 MB

Richiede iOS 9.0 o versioni successive. Compatibile con iPhone 5S, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPad Air, iPad Air Wi‑Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi‑Fi + Cellular, iPad mini 3, iPad mini 3 Wi‑Fi + Cellular, iPad mini 4, iPad mini 4 Wi‑Fi + Cellular, iPad Pro 12,9", iPad Pro 12,9" Wi‑Fi + Cellular, iPad Pro 9,7", iPad Pro 9,7" Wi‑Fi + Cellular, iPad (5ª generazione), iPad (5ª generazione) Wi‑Fi + Cellular, iPad Pro 12,9" (2ª generazione), iPad Pro 12,9" (2ª generazione) Wi‑Fi + Cellular, iPad Pro 10,5", iPad Pro 10,5" Wi‑Fi + Cellular, iPad (6ª generazione), iPad Wi‑Fi + Cellular (6ª generazione), iPad Pro 11", iPad Pro 11" Wi-Fi + Cellular, iPad Pro 12,9" (3ª generazione), iPad Pro 12,9" (3ª generazione) Wi‑Fi + Cellular, iPad mini (5ª generazione), iPad mini (5ª generazione) Wi‑Fi + Cellular, iPad Air (3ª generazione), iPad Air (3ª generazione) Wi‑Fi + Cellular, iPad (7ª generazione), iPad (7ª generazione) Wi‑Fi + Cellular, iPad Pro 11" (2ª generazione), iPad Pro 11" (2ª generazione) Wi‑Fi + Cellular, iPad Pro 12,9" (4ª generazione), iPad Pro 12,9" (4ª generazione) Wi‑Fi + Cellular, iPod touch (6ª generazione) e iPod touch (7ª generazione).

Acquisti in-app
  1. Decode 10 1,09 €
  2. Decode 30 3,49 €
  3. Decode 100 5,49 €


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