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.

If you have problems recovering a corrupted or unsaved Notepad file, then use one of these 3 methods to recover the Notepad file.

Anyone know of a way on a win98 machine that I can create an icon that will prompt the user to open a file, and then open it in notepad?I thought for sure there was a command line switch that ...

Need to use third-party programs to open files on your PC? Here's how to change file associations in Windows 10 and choose which apps open which file types.

I need to open up 4 text files at a time all with the same name but with different extensions. I've created a very simple batch file to take care of this using notepad, but it will only open up ...

And Notepad defaults to margin settings that don’t accommodate a typical 80-column text file. If you want a quick hard copy of your plain text files, the formatting change may distract from ...

MBOX files are a convenient and flexible file format that can be opened in any text editor -- including Microsoft Notepad, Apple TextEdit or GitHub Atom.