Winmail.dat Opener for PC
Reviewed by Apps Playground Editorial Team · Updated
What's New
| Version | 4.0.1 |
| Size | 5.0 MB |
| What's New | Bugfixes |
Winmail.dat Opener solves a specific problem: you receive an email attachment labeled winmail.dat and have no way to access its contents on your phone. This free tool extracts those files letting you view them, and running Winmail.dat Opener on PC lets you work with larger attachments and keep your email session active in one stable location while extracting and organizing files on the side.
Winmail.dat files are a quirk of Microsoft Outlook: sometimes the email client wraps attachments and formatting into a single .dat file instead of sending them normally. When that happens, your phone or tablet may not recognize what's inside. Winmail.dat Opener for Windows PC extracts those hidden files letting you open them in their original format.
How the Extraction Works
The process unfolds in straightforward steps once you have Winmail.dat Opener installed on your computer.
- Save the winmail.dat attachment from your email to a folder on your desktop or Downloads.
- Open Winmail.dat Opener and use its built-in file dialog to locate the .dat file you saved.
- The app reads the file and displays a list of all contained files.
- Tap or click any file in the list to preview it in a compatible viewer.
- Long-tap or right-click files you want to keep, then save them to your preferred location.
Working Alongside Your Email
On a desktop setup, Winmail.dat Opener sits quietly in the background while you keep your email client open in another window. You can leave your inbox visible, copy or drag the problematic attachment to a working folder, then process it in Winmail.dat Opener without closing your email session. The app works with most standard file types once extracted (images, documents, spreadsheets) so you're not locked into a single viewer. Keyboard shortcuts and clipboard operations on a full computer make moving files between windows faster than on a mobile device.
Understanding File Compatibility
Not every file with a .dat extension is a winmail.dat file. Some applications use .dat as a generic data format, and Winmail.dat Opener cannot extract those. The app will let you know if a file is not a true TNEF (Transport Neutral Encapsulation Format) winmail.dat. Before installing Winmail.dat Opener for computer use, confirm that your .dat file actually came from Outlook: check the email headers or ask the sender to resend using a different attachment method. Some Outlook versions also embed only styling information in winmail.dat files rather than actual file attachments, which explains why some extractions appear empty.
Ad Support and Permissions
Winmail.dat Opener is free and does not require payment to extract files. The app displays ads to stay free, which is why it requests internet permission during installation. An optional paid upgrade removes ads if you prefer an uninterrupted experience.
How to Download and Install Winmail.dat Opener for PC or MAC:
Select an Android emulator: There are many free and paid Android emulators available for PC and MAC, few of the popular ones are Bluestacks, Andy OS, Nox, MeMu and there are more you can find from Google.
Compatibility: Before downloading them take a look at the minimum system requirements to install the emulator on your PC.
For example, BlueStacks requires OS: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP2, Windows XP SP3 (32-bit only), Mac OS Sierra(10.12), High Sierra (10.13) and Mojave(10.14), 2-4GB of RAM, 4GB of disk space for storing Android apps/games, updated graphics drivers.
Finally, download and install the emulator which will work well with your PC's hardware/software.
- Open the emulator software from the start menu or desktop shortcut in your PC.
- Associate or set up your Google account with the emulator.
- You can either install the app from Google PlayStore inside the emulator or download Winmail.dat Opener APK file and open the APK file with the emulator or drag the file into the emulator window to install Winmail.dat Opener for PC.
You can follow above instructions to install Winmail.dat Opener for PC with any of the Android emulators available.
Download Winmail.dat Opener
Winmail.dat Opener for PC
FAQ
Why is my winmail.dat file not opening in the app?
The most common reason is that the file is not actually a winmail.dat (TNEF) file, even if it has a .dat extension. Verify with your email sender that the attachment came directly from Outlook. Other applications also use .dat extensions for unrelated file formats. If you are certain it is a winmail.dat file, ensure you saved it to a location your computer can access and that the file was not corrupted during download.
Can I open the winmail.dat file directly from my email client?
On desktop email clients, Winmail.dat Opener may appear in the right-click context menu of an attachment, allowing direct opening. If it does not appear, save the winmail.dat file first, then open it through the app's file browser.
What happens after I extract the files?
Once extracted, the files are standard formats (PDFs, images, documents) and open in whatever default program you have set for each file type. You can save them to your hard drive, move them to cloud storage, or work with them immediately.
Does Winmail.dat Opener work offline?
The app extracts files locally on your computer. Internet access is only needed for displaying ads; the extraction process itself does not require a connection.
Why does the app ask for storage permissions?
Winmail.dat Opener needs permission to read the .dat file from your storage and write extracted files to your chosen location. This is standard behavior for any file extraction tool on Windows.
The editorial team installs and tests each app before writing up the guide, and keeps the version history current. The site has never charged developers for coverage.