# Winmail File Viewer & Opener — Extract files from winmail.dat

> Opens and extracts attachments from winmail.dat (TNEF) email files. (iPhone/iPad app by An Sinh Pham.)

- Source: https://appshunter.io/ios/app/winmail-file-viewer-and-opener/id379500151 (this page in markdown: same URL + `.md`)
- Developer: [An Sinh Pham](https://appshunter.io/developer/1475832880)
- Category: Business, Utilities
- Price: Free with in-app purchases
- Rating: 4.10/5 from 86 App Store ratings · 288 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 3 more
- Released: 2010-07-09
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/winmail-file-viewer-and-opener/id379500151/reviews.md

## What is Winmail File Viewer & Opener?

Winmail File Viewer & Opener lets you open winmail.dat files on iPhone, iPad, and Mac - and extract the real attachments inside.

Some emails from Microsoft Outlook / Exchange arrive as a winmail.dat file (also called TNEF), which can hide the attachments you actually need. This app decodes the file so you can view its contents and save the attachments in seconds.

Private by design: everything is processed on-device, works offline, and requires no account.

How it works

1. Import a winmail.dat file from Mail, Files, or the Share Sheet
2. View the message contents and attachment list
3. Extract and save attachments to the Files app, or share them anywhere

Key features

- Open winmail.dat / TNEF quickly
- Preview and extract common attachments (PDF, DOCX, images, and more)
- One-tap Save, Share, or Copy
- Works across iPhone, iPad, and Mac
- Lightweight interface designed for fast access

If you regularly receive emails with missing Outlook attachments, this is the easiest way to open winmail.dat and get your files back.

Privacy Policy: https://www.winmailviewer.com/privacy
Terms of Use: https://www.winmailviewer.com/terms
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Open winmail.dat / TNEF files
- Extract hidden email attachments
- Preview common file types
- Save or share attachments
- Works offline and on-device
- Supports iPhone, iPad, and Mac

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Winmail Unlimited (Monthly) | $9.99 | per month |
| Winmail Unlimited (Annual) | $59.99 | per year |
| Winmail Unlimited (Weekly) | $4.99 | per 7 days |
| Unlimited (Monthly) - 30% Off! | $6.99 | per month |
| Unlimited (Weekly) - 20% Off! | $3.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Decode 10 | $4.99 | one-time |
| Decode 30 | $9.99 | one-time |
| Decode 100 | $29.99 | one-time |


## What do users think of Winmail File Viewer & Opener?

Overall sentiment: neutral

**Pros**

- 🚀 Easy to use
- 👍 Solves a common problem
- 💡 Useful for business users
- 🚀 Works as advertised
- 👍 Great customer service

**Cons**

- 🐛 Doesn't work with some file types
- 💰 Requires payment for extended use
- 🐛 Compatibility issues with newer iOS versions
- 🐛 Crashes or doesn't open files

**Commonly reported bugs**

- Crashes when opening certain files
- Blank screen or no content displayed
- Compatibility issues with iPhone 4S and iPad

**Most requested features**

- Ability to view and edit files
- Improved file format compatibility
- Automatic updates for new iOS versions

## Recent user reviews (10 of 288)

All indexed reviews: https://appshunter.io/ios/app/winmail-file-viewer-and-opener/id379500151/reviews.md

### 1/5 — Did not work

*2026-07-01, version 5.0*

Hope I cancelled before they charged me.

### 1/5 — Precio inflado

*2025-08-05, version 5.1*

Con windows pc hay opciones gratuitas.

### 1/5 — Worthless

*2024-12-20, version 4.3*

Buggy & worthless. Help link doesn’t work. Requires payment for each file opened after the first one, but there’s no apparent way to do that or to find out how much it costs.

### 5/5 — Awesome!

*2024-05-23, version 2.14*

I’ve never come across these winmail files until yesterday! So finding this app and how easy it was to use was a real relief! Thank you!

### 4/5 — 現状のwinmail抽出アプリの中で唯一まともに動作する

*2023-01-17, version 3.4.0*

2023年1月の時点において、他の有料購入アプリがクラッシュしたり日本語のファイル名が文字化けしたりする中、唯一完全動作する。
ただ、買い切りのアプリではなく若干高くつくのが難点。

### 1/5 — doesn’t work

*2022-08-05, version 3.4.0*

i doesn’t like to use this app and it can not solve the problem for us to use this app to open the winmail files in times.

### 1/5 — Horrible

*2022-06-20, version 2.14*

If I could give 0 stars I would. Purchased the monthly access, and it still doesn’t allow me to view any files. Waste of money, look elsewhere!

### 1/5 — Wird im Auswahlmenü nicht sngezeigt

*2022-06-02, version 2.14*

Die App wird beim anklicken nicht angezeigt und kann daher auch nicht ausgewählt werden.
Ein manuelles Öffnen geht auch nicht da nicht vorgesehen.
Lösche sie jetzt wieder.

### 3/5 — Attention

*2022-05-05, version 2.14*

Cette application fonctionne parfaitement MAIS ATTENTION, vous pourrez ouvrir 1 seul document, après ça il faudra vous acquitter de 1,99€ pour 10 ouverture de fichiers.
Dommage.

### 3/5 — Works well but…

*2022-01-14, version 2.14*

You have to pay for more open more than a few files.

## Frequently asked questions about Winmail File Viewer & Opener

### What is a winmail.dat file?

A winmail.dat file, also known as TNEF, is a proprietary format used by Microsoft Outlook and Exchange that can sometimes hide the actual attachments within an email. This app is designed to decode these files and reveal the hidden content.

### How do I open a winmail.dat file with this app?

You can import a winmail.dat file directly from your Mail app, the Files app, or by using the Share Sheet. Once imported, the app will process the file, allowing you to view its contents and extract attachments.

### Can I extract attachments from winmail.dat files?

Yes, the primary function of this app is to extract attachments from winmail.dat files. You can preview common attachment types like PDFs, DOCX documents, and images, and then save or share them to your Files app or elsewhere.

### Is this app compatible with my devices?

This application is designed to work across Apple devices, including iPhone, iPad, and Mac. It offers a lightweight interface for fast access and processes all data on-device, ensuring privacy and offline functionality.

### Is there a cost to use this app?

The app is free to download and use, with in-app purchases available. This allows you to access its core functionality for opening and extracting winmail.dat files without an upfront cost.

## Version history (last 5 releases)

### 5.13 — 2026-07-05

Winmail File Viewer 5.13 makes Outlook calendar and contact data much easier to use.

- Meeting requests hidden inside winmail.dat files can now be recovered as standard `.ics` calendar files.
- Contact cards hidden inside winmail.dat files can now be recovered as `.vcf` files.
- Add extracted events to Calendar and contact cards to Contacts using native iOS editors.
- Calendar and contact attachments now have clearer icons and labels.
- Subscription/account status refreshes more reliably after purchase or restore.

### 5.12 — 2026-06-12

- Added improved winmail.dat message previews with email metadata and message body support.
- Added attachment thumbnails and clearer file type badges.
- Added per-file actions for sharing and saving extracted attachments.
- Added Save All support for extracted files.
- Improved temporary file handling and cleanup after decoding.
- Improved decoder reliability with additional fixture coverage for common winmail.dat cases.
- Refined limited-mode and upgrade flow messaging.

### 5.11 — 2026-03-17

- Cleaner, distraction-free interface
- Bug fixes and performance improvements
- Improved error messages with full localization
- Added support for more languages

### 5.10 — 2026-03-04

- Open winmail.dat files in 13 languages including Japanese, Korean, Chinese, French, German, Spanish, and more
- Improved app stability and user experience

### 5.9 — 2026-02-19

- UI improvements

## Apps similar to Winmail File Viewer & Opener

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Winmail Reader](https://appshunter.io/ios/app/winmail-reader/id835792417) | 4.5 (256) | $1.99 | Business |

## More apps by An Sinh Pham

- [Archive Extractor: Unzip Files](https://appshunter.io/ios/app/archive-extractor-unzip-files/id1478494515)
- [Parquet Viewer](https://appshunter.io/ios/app/parquet-viewer/id1644790888)
- [Truth or Dare: Late Night](https://appshunter.io/ios/app/truth-or-dare-late-night/id6474071612)
- [Would You Rather: After Dark](https://appshunter.io/ios/app/would-you-rather-after-dark/id6742191962)
- [AImagify: AI Photo Editor](https://appshunter.io/ios/app/aimagify-ai-photo-editor/id6751795377)

All apps by An Sinh Pham: https://appshunter.io/developer/1475832880

## Related topics

[winmail file viewer](https://appshunter.io/ios/topics/winmail-file-viewer) · [winmail viewer](https://appshunter.io/ios/topics/winmail-viewer) · [winmail.dat viewer & opener](https://appshunter.io/ios/topics/winmail-dat-viewer-opener) · [winmaildat opener](https://appshunter.io/ios/topics/winmaildat-opener) · [winmail.dat opener · win dat](https://appshunter.io/ios/topics/winmail-dat-opener-win-dat) · [winmail reader](https://appshunter.io/ios/topics/winmail-reader) · [winmail reader lite](https://appshunter.io/ios/topics/winmail-reader-lite) · [winmail dat](https://appshunter.io/ios/topics/winmail-dat) · [windat opener](https://appshunter.io/ios/topics/windat-opener) · [.dat viewer](https://appshunter.io/ios/topics/dat-viewer) · [winmail](https://appshunter.io/ios/topics/winmail) · [winmail.dat opener](https://appshunter.io/ios/topics/winmail-dat-opener)

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*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 2026-08-31.*