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.

File Setup To build a CSV file to open in Microsoft Excel, you'll need to decide how many columns you'll use in Microsoft Excel for the categories of information you're preparing in Notepad.

While it is technically possible to open an Excel file in Notepad, this is not a good idea. Excel files are binary files that contain complex formatting and data structures. When you open an Excel ...

Despite its slim profile and Windows 3.1-style interface, Notepad is a tool that Windows users have come to know and love, using it for all manner of tweaking, quick editing, and other tasks. The ...

Microsoft decided to fix one of Notepad's longest running problems: garbled text files from other operating systems.