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Winmail Viewer - Letter Opener

Winmail Viewer - Letter Opener

Open Email, MSG & XPS files

5K ratings
1031 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

Released
December 31, 2010
Updated
October 3, 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
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What's New in Winmail Viewer

17.1.2

October 3, 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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Subscriptions & In-App Purchases

Professional

Open Winmail.dat, MSG, XPS files

$49.991 Year
How to cancel Winmail Viewer subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Terrible app

Won’t open any attachments. App needs to have bugs worked out
SSeattllelite

Works great

Works great and does what I need 👍🏻
SSpeedtester007

Winmail letter opener App

Easy to use once downloaded
F9Freight man 91

pos

Free?? One time use wants to sell a subscription. DELETED
UUnhappy#200

A game changer

So pleased I found this app as I was tearing my hair out trying to sort this problem. The sender said the problem was at my end and they couldn’t do anything to help. Thank you for saving my sanity
CCypriotJ
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Developer apps

Letter Opener - Winmail Viewer
Letter Opener - Winmail Viewer

by Letter Opener GmbH

📊 Productivity

(771)

Free
See developer apps

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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.