You can open .DAT files that contain text, with text editors, like Notepad, Notepad++, VS Code, etc. But it is not possible to know what contains in a DAT file.

A JAR file is an archive file but is more than a file compression format. Here's how to open, run, or execute JAR files.

Getting a DAT file open on your Windows machine can require one of a few different approaches — to be determined by the kind of data the DAT file contains. Start with text editing software like ...