# Winmail Viewer - Letter Opener — Open Email, MSG & XPS files > Utility to open and convert Winmail.dat, MSG, and XPS email files. (iPhone/iPad app by Letter Opener GmbH.) - Source: https://appshunter.io/ios/app/winmail-viewer-letter-opener/id411897373 (this page in markdown: same URL + `.md`) - Developer: [Letter Opener GmbH](https://appshunter.io/developer/373066203) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 4.80/5 from 4,844 App Store ratings · 541 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 39 MB - Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China) and 2 more - Released: 2010-12-31 - Data updated: 2026-08-26 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/winmail-viewer-letter-opener/id411897373/reviews.md ## What is Winmail Viewer? Open Winmail.dat, MSG and XPS files with just a tap. ABOUT A winmail.dat file or MSG file is an email from Microsoft Outlook that can not be read by other email applications. It needs to be converted for the content to be accessible. Letter Opener does that with a simple tap! With over 10 years experience (and a special dislike for winmail.dat files) we made sure that working together with Microsoft Outlook and Windows users can be simple and seamless. FEATURES - Open Winmail.dat and MSG files and convert appointments, notes, contacts etc. to iOS native formats. - Get access to all attachments in Winmail.dat files. - Export files to another app. SUPPORT We provide direct personal support, so don’t hesitate to contact us if you have any questions or comments: support@winmail.help Thanks for helping us to keep improving Letter Opener! TERMS OF USE https://winmail.help/legal/terms ## Key features - Open Winmail.dat, MSG, and XPS files - Convert appointments, notes, and contacts - Access all attachments - Export files to other apps - iOS native format conversion ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Professional | $49.99 | per year | | Yearly | $9.99 | per year | | Weekly | $0.99 | per 7 days | | Monthly | $1.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Winmail.dat Premium | $19.99 | one-time | | MSG Premium | $19.99 | one-time | | File Extension Premium | $19.99 | one-time | | XPS Premium | $19.99 | one-time | ## Recent user reviews (10 of 541) All indexed reviews: https://appshunter.io/ios/app/winmail-viewer-letter-opener/id411897373/reviews.md ### 5/5 — Great app! *2026-08-06, version 17.0.0* I needed something opened immediately. ChatGPT recommended this and it works great thank you so much. ### 5/5 — Winmail my starsssss *2026-08-05, version 17.0.0* Great viewer open up. I am deeply sincerely loved the Winmail Viewer. ### 4/5 — Seems to work! *2026-07-29, version 17.0.0* Just tried it and can read the darn invoice! ### 5/5 — Works great! *2026-07-17, version 17.0.0* Works great for me. No issues. ### 5/5 — Good product *2026-07-14, version 17.0.0* Does the job - installed on desktop and mobile. ### 4/5 — Ok *2026-07-13, version 17.0.0* Annoying review pop up but app helps me view check easily ### 5/5 — Excellent! *2026-07-09, version 17.0.0* Great app! Works perfectly! ### 5/5 — Best bridge app *2026-07-09, version 17.0.0* This is literally the only way I can see my paystubs. Every other app won’t open it because of the format it’s delivered in. ### 5/5 — it worked! *2026-06-30, version 17.0.0* Not sure how often I’ll need this, but it worked once. ### 5/5 — Awesome *2026-06-29, version 17.0.0* Awesome app ## Frequently asked questions about Winmail Viewer ### 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. ## Version history (last 5 releases) ### 17.0.0 — 2026-03-19 Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks! ### 16.0.9 — 2025-04-11 Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks! ### 16.0.8 — 2025-03-22 Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks! ### 16.0.7 — 2025-03-20 Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks! ### 16.0.6 — 2025-02-06 Improved Winmail.dat, MSG and XPS file support. If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks! ## Apps similar to Winmail Viewer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Email for Hotmail & Outlook](https://appshunter.io/ios/app/email-for-hotmail-and-outlook/id6447046075) | 4.1 (2,870) | Free | Utilities | | [Google Chrome](https://appshunter.io/ios/app/google-chrome/id535886823) | 4.7 (3,774,186) | Free | Utilities | | [Winmail Viewer – DAT Opener](https://appshunter.io/ios/app/winmail-viewer-dat-opener/id6752894720) | 4.7 (17) | Free | Utilities | | [Winmaildat Opener](https://appshunter.io/ios/app/winmaildat-opener/id596413390) | 3.6 (75) | Free | Utilities | | [EMLens - EML File Reader](https://appshunter.io/ios/app/emlens-eml-file-reader/id6737518295) | 4.0 (1) | Free | Utilities | | [The Document Converter](https://appshunter.io/ios/app/the-document-converter/id893322800) | 4.7 (5,936) | Free | Utilities | ## More apps by Letter Opener GmbH - [Letter Opener - Winmail Viewer](https://appshunter.io/ios/app/letter-opener-winmail-viewer/id635655539) All apps by Letter Opener GmbH: https://appshunter.io/developer/373066203 ## Related topics [winmail file viewer](https://appshunter.io/ios/topics/winmail-file-viewer) · [windat opener](https://appshunter.io/ios/topics/windat-opener) · [winmail](https://appshunter.io/ios/topics/winmail) · [winmail viewer](https://appshunter.io/ios/topics/winmail-viewer) · [.dat viewer](https://appshunter.io/ios/topics/dat-viewer) · [rpmsg](https://appshunter.io/ios/topics/rpmsg) · [winmail reader lite](https://appshunter.io/ios/topics/winmail-reader-lite) · [winmaildat opener](https://appshunter.io/ios/topics/winmaildat-opener) · [msg viewer pro](https://appshunter.io/ios/topics/msg-viewer-pro) · [xml viewer sms](https://appshunter.io/ios/topics/xml-viewer-sms) · [winmail.dat viewer & opener](https://appshunter.io/ios/topics/winmail-dat-viewer-opener) · [winmail dat](https://appshunter.io/ios/topics/winmail-dat) · [winmail reader](https://appshunter.io/ios/topics/winmail-reader) · [msg viewer](https://appshunter.io/ios/topics/msg-viewer) · [file opener image](https://appshunter.io/ios/topics/file-opener-image) · [file opener ics](https://appshunter.io/ios/topics/file-opener-ics) · [eml viewer](https://appshunter.io/ios/topics/eml-viewer) · [xps viewer](https://appshunter.io/ios/topics/xps-viewer) · [mailpeek msg viewer](https://appshunter.io/ios/topics/mailpeek-msg-viewer) · [viewers](https://appshunter.io/ios/topics/viewers) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*