# WinDat Opener — Decodes winmail.dat files

> Utility to decode winmail.dat email attachments and extract embedded files. (iPhone/iPad app by Alexander McGuffog.)

- Source: https://appshunter.io/ios/app/windat-opener/id404795709 (this page in markdown: same URL + `.md`)
- Developer: [Alexander McGuffog](https://appshunter.io/developer/404795712)
- Category: Utilities, Productivity
- Price: $5.99
- Rating: 2.30/5 from 3 App Store ratings · 24 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 2 MB
- Languages: American English
- Released: 2010-12-01
- Data updated: 2026-06-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/windat-opener/id404795709/reviews.md

## What is WinDat Opener?

· Decodes all winmail.dat files
· iOS 17 and iPadOS 17 support
· Full support for drag-and-drop on iPads
· File manager integration; WinDat Opener will open and save files to and from any location that file manger supported, e.g., iCloud and DropBox
 
WinDat Opener opens the "winmail.dat" email attachments that are sometimes sent by Outlook and Outlook Express email clients. These files are in “TNEF” format, and usually contain attachments such as spreadsheets or presentations embedded within them. WinDat Opener extracts the embedded attachments hidden inside the winmail.dat file, allowing you to preview then right in WinDat Opener, or open them with another application, e.g., Pages. 

WinDat Opener is simple to use - it integrates transparently with Mail on the iPhone, iPod Touch or iPad at operating system level, and has it's own integrated file manager that gives you access to locations on your device, and cloud storage provides such as DropBox and iCloud. Once WinMail Opener is installed, all you have to do is to touch any winmail.dat file, and the app you're using will offer to send it to WinMail Opener for the embedded attachments to be extracted. You can then view the extracted files using Winmail Opener’s built-in file viewer, which supports a wide variety of document formats including doc, docx, xls, xlsx, ppt, pptx and PDF, as well as most image formats such as JPEG and TIFF. If you have an application installed on your device that can edit or view an extracted file, e.g., Pages for doc files, you can open any extracted file in that application. WinDat Opener also offers the option of emailing the extracted files, right from within WinDat Opener.

WinDat Opener is a universal application. It will work on the iPhone, iPod Touch or iPad, in any orientation. WinDat Opener works on any version of iOS from 11 onward.

## Key features

- Decodes all winmail.dat files
- iOS 17 and iPadOS 17 support
- Drag-and-drop support on iPads
- File manager integration (iCloud, Dropbox)
- Extracts and previews embedded attachments
- Supports various document and image formats

## Recent user reviews (10 of 24)

All indexed reviews: https://appshunter.io/ios/app/windat-opener/id404795709/reviews.md

### 5/5 — Works Great!!!!

*2019-02-17*

I use it to open my pay stubs
from my employer.

### 5/5 — Awesome

*2018-12-12*

Quick easy simple. Even an option in mail app so you can open right from there

### 1/5 — Nothing works

*2018-07-05*

Noghing there. Cannot even get data from it. What a waste.

### 1/5 — Does not work

*2016-08-02*

Does not work

### 1/5 — I want a refund!!!

*2016-03-12*

Does not work!!!!!!!!

### 1/5 — Useless

*2014-11-26*

Completely non-functional.  Failed to open any file I tried to use it on. There is a free app which works perfectly.  Don't waste your $3 like I did.

### 1/5 — windat opener

*2014-10-27*

never got it to work

### 5/5 — Works great!

*2014-08-23*

This is just what I needed. Now it's easy to open windat files.

### 4/5 — Works as intended.

*2013-11-20*

This program works as intended. I am satisfied with it.

### 5/5 — It Works

*2013-08-13*

It worked just fine for me. Once the app extracts the files from winmail.dat, I had no problem viewing them in either Quick Look or Quickoffice. If I run into something, I'll update my review, but as for now, everything seems to be working as it should.

## Frequently asked questions about WinDat Opener

### What is WinDat Opener used for?

WinDat Opener is used to open and extract attachments from winmail.dat email files, which are often sent by Outlook clients. It allows you to access embedded spreadsheets, presentations, and other documents.

### How much does WinDat Opener cost?

WinDat Opener is a paid application. It is priced at $5.99.

### What devices is WinDat Opener compatible with?

WinDat Opener is a universal application that works on iPhone, iPad, and iPod Touch devices. It supports iOS versions from 11 onward.

### Does WinDat Opener have ads?

No, WinDat Opener does not contain advertisements. It is a paid utility that provides an ad-free experience.

### How often is WinDat Opener updated?

The latest version of WinDat Opener, 3.1.5, was released on September 25, 2023. Updates typically address compatibility with new iOS versions and improve functionality.

### Can WinDat Opener open files from cloud storage?

Yes, WinDat Opener integrates with file manager services like iCloud and Dropbox. You can open and save files to and from these cloud storage locations.

### What file formats can WinDat Opener preview?

WinDat Opener's built-in file viewer supports a wide variety of document formats including doc, docx, xls, xlsx, ppt, pptx, and PDF, as well as most image formats like JPEG and TIFF.

### What is the age rating for WinDat Opener?

WinDat Opener has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

## Version history (last 5 releases)

### 3.1.5 — 2023-09-25

Optimized for iOS 17 and iPadOS 17

### 3.1.4 — 2022-09-18

Optimized for iOS 16

### 3.1.3 — 2021-09-23

Updated for iOS 15 and iPadOS 15

### 3.1.2 — 2020-09-17

Updated for iOS 14 and iPadOS 14

### 3.1.1 — 2020-03-07

Performance improvements

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## More apps by Alexander McGuffog

- [PhotoRaw](https://appshunter.io/ios/app/photoraw/id413899112)

All apps by Alexander McGuffog: https://appshunter.io/developer/404795712

## Related topics

[alexander mcguffog](https://appshunter.io/ios/topics/alexander-mcguffog) · [windat opener](https://appshunter.io/ios/topics/windat-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 2026-06-24.*