Winmail.dat Opener

📱 About the App

Winmail.dat Opener is a professional tool designed to help you open "winmail.dat" (TNEF), Outlook ".msg", and XPS files directly on your iOS device. It provides a clean, privacy-focused environment to view emails and extract attachments.

📂 Formats

winmail.dat, .msg, .xps, .oxps

🔒 Privacy

100% Local Processing

🚀 Fast

Native Swift Engine

❓ Frequently Asked Questions

How do I open a file?

1. Open the "Mail" app or "Files" app.
2. Tap on the attachment (e.g., winmail.dat).
3. Tap the "Share" icon (square with arrow up).
4. Select Winmail Opener from the app list.

Why do I receive "winmail.dat" files?

This happens when a sender using Microsoft Outlook sends an email using the "Rich Text" format instead of HTML. Other email clients (like Apple Mail) often cannot read this format natively, hiding attachments inside the "winmail.dat" file.

Can I save attachments?

Yes. After opening a file, you can tap on any attachment to view it. Use the "Share" button within the viewer to save it to your Files app, Photos, or share it with other apps.

Does it support XPS/OXPS files?

Yes. Starting with version 2026, we fully support viewing XPS and OXPS documents with high fidelity.

Are my files safe?

Absolutely. The app works completely offline. Your files are processed in your device's memory and are never sent to any external server.

💡 Tips

Enable "History" in settings to keep a log of recently opened files for quick access.
The app supports Dark Mode for comfortable reading in low light.

📧 Contact Us

Email: st67891@gmail.com

Feedback: If you encounter a file that won't open, please feel free to email it to us for analysis (if it contains no sensitive data). We are constantly improving our parsing engine.

We usually respond within 24 hours.

📋 App Information

Name: Winmail.dat Opener

Version: 2026.1

Compatibility: iOS 18.0+