How to Open a .DAT File. .DAT is a commonly used file extension for saving generic data records. The information contained within a .DAT file depends on the program used to create it, but it will ...

The most interesting solution from a reader was to open the winmail.dat file in Notepad to identify the correct filename for the attachment, then re-name the winmail.dat file with the correct ...

Learn how to open CSV files on Windows 11 using Excel, Notepad, Google Sheets, and more – step-by-step methods for any setup.

In reality, though, when you double-click on it, it would instead open in Notepad because its true, but not visible, extension is actually .txt, which corresponds to a text file.