Here is a complete guide for you to create, view, and edit GEDCOM files on your Windows 11/10 PC. A GEDCOM file is basically a genealogical data file that consists of family trees. It is one of the ...

On occasion you may receive a strange attachment in your email called Winmail.dat. When you try to open it Windows will not let you, and the person sending it to you has no idea what it is. Do not ...

.dat can mean many things. data of any type quite often ends up with these extensions. How about using the app that created them? You can also try viewing them in notepad.