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Overview System Requirements Reviews Related


Letter Opener for Windows delivers a powerful Winmail.dat Viewer in an easy-to-use, modern app. Some people still use Outlook. And whenever they send you something like an attachment, it shows up in your Mail with a winmail.dat file attached. (Ugh.) But Letter Opener seamlessly converts all types of Outlook’s irksome winmail.dat files. (Hooray!) Made with a special 😤 for winmail.dat files.


Additional information

Published by

Letter Opener GmbH


Copyright © 2006–2019, Letter Opener GmbH

Developed by

Letter Opener GmbH

Release date


Approximate size

28.88 MB

Age rating

For ages 3 and up



This app can

Access your Internet connection


Get this app while signed in to your Microsoft account and install on up to ten Windows 10 devices.

This product needs to be installed on your internal hard drive.

Language supported

English (United States)
Deutsch (Deutschland)

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