Dealing with the winmail.dat file

Email users sometimes find that they receive email message with strange file attachment, such as "winmail.dat", the file is either not able to open or contain "garbage" data, you may refer to the solution as step below.

Locally open the file.
1. Download the program named WMDecode from, unzip it.
2. Place the winmail.dat file to the same folder with WMDecode application.
3. Double click WMDecode.exe, the application will decode the attachment if winmail.dat contain any attachment.

Online viewer.
1. Browse to
2. Browse the file winmail.dat from your folder.
3. Select "Send file" button.

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