It's a straightforward website that lets you upload and open DAT files without needing to sign up or provide an email. Simply drag and drop your file into the box. Keep in mind there's a 50MB file ...

If the DAT file is a video, you can open it with its associated video app. However, if you aren't sure what app it's intended for, VLC Media Player should be able to open it as well.

Q. I received e-mail from a relative that says it is in a winmail.dat file. When I try to open the file, I get a message that says something like: "You are attempting to open a dat file. They are ...

Tips on opening a winmail.dat file, keeping seldom-used ink cartridges from drying out, and undoing an Undo. ... Several developers have created helpful programs that can open the files.

If the DAT file you're trying to open is text, you can convert the file into text in the Microsoft Excel program by first saving it as a CSV file. Right-click the DAT file on your PC and click "Open." ...