Open DAT files with File Viewer Plus

Winmail.dat file open in File Viewer Plus 3
A Winmail.dat File open in File Viewer Plus 3

Do you need to open a Winmail.dat file (.DAT file)?

File Viewer Plus can open Winmail.dat files! It allows you to view the formatting information and convert it to other formats, such as EML, MSG, HTML, and plain text.

Open Winmail.dat files without an email program. Try File Viewer Plus today!

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What is a .DAT file?

dat file icon

Winmail.dat files are created by Microsoft Exchange Server to contain rich text (RTF) formatting information for email messages sent by Microsoft Outlook or Microsoft Mail. The files are typically invisible to the recipient because they are only meant to be read by the email client receiving the message. However, if the mail client cannot read the formatting information, the Winmail.dat file is visible to the recipient and attached to the email message.

If you receive an email message with a Winmail.dat file attached, you can open it with File Viewer Plus. The program allows you to view the contents of the message and convert it to an email format, such as EML or MSG. You can also convert it to HTML or plain text.

Learn more about DAT files at

File Viewer Plus DAT Support

Batch Convert

Conversion options:
EML, MSG, HTML, Plain text

About File Viewer Plus

File Viewer Plus is a universal file viewer for Windows. Why pay for many software programs and clutter your PC when you only need one? File Viewer Plus supports over 300 file types. No longer do you need to buy extra software or install shady programs to open unknown or unique file types. File Viewer Plus also enables you to edit, save, print, and quickly convert your files.

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