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Winmail Viewer - Letter Opener

Winmail Viewer - Letter Opener

Open Email, MSG & XPS files

4.9K ratings
547 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 31, 2010
  • September 14, 2026

Features

Developer

Letter Opener GmbH
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iphone
ipad
🧾$19.99
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About

Easily open and view Winmail.dat, MSG, and XPS email files that are incompatible with most email clients. Convert embedded content like appointments and notes into native iOS formats, and access all attachments within these files.

✓Open Winmail.dat, MSG, and XPS files
✓Convert appointments, notes, and contacts
✓Access all attachments
✓Export files to other apps
✓iOS native format conversion
Show original description
+2

What's New in Winmail Viewer

17.0.3

September 14, 2026

Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks!

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Subscription plans

Professional

Open Winmail.dat, MSG, XPS files

$49.991 Year
How to cancel Winmail Viewer subscription ⁉️
4

In-App Purchases

$19.99

Winmail.dat Premium

Access to attachments in winmail.dat files

User reviews

Most RecentHighest RatedLowest Rated

It Works!

Easy to use, works every time. I no longer dread the winmail.dat. These guys deserve a pat on the back … and if you’re in the same town, a beer.
FlashGourdFlashGourd

Love this app, hate windat files

Love this app, hate windat files
kand3kand3

Great app

5star!
gfc1874gfc1874

Works well

Opens attachments which I cannot open otherwise
StephenwestStephenwest

Great product!

My office has been sending out schedules via winmail recently and I was unable to access the information until I found this tool. I can see it instantly and copy it to a folder without any issues.
Bailiff 18Bailiff 18
See 542 more reviews

Developer apps

Letter Opener - Winmail Viewer
Letter Opener - Winmail Viewer

by Letter Opener GmbH

📊 Productivity

(772)

Free
See developer apps

FAQ

What does this app do?

This app allows you to open and view Winmail.dat, MSG, and XPS email files that are typically unreadable by other email applications. It converts embedded content like appointments and notes into formats compatible with your iOS device and provides access to all attachments.

How do I open a Winmail.dat file?

Simply tap on the Winmail.dat file when you receive it, and the app will open it automatically. It then processes the file to make its content accessible, including any attachments or embedded items like calendar events.

Is this app free to use?

The app is free to download and use for basic functionality. However, it offers in-app purchases, suggesting that some advanced features or unlimited usage may require a purchase.

What kind of content can be converted?

The app can convert appointments, notes, and contacts that are embedded within Winmail.dat and MSG files into iOS native formats. This ensures that you can easily integrate this information into your device's native applications.

Can I save or share the opened files?

Yes, the app allows you to export the opened files or their content to another application on your device. This makes it easy to share the information or save it in a different format for later use.