If you're having trouble opening a DAT file, I'll show you a simple and free way to do it. This method works on both Mac and PC. Just open your browser and go to winmaildat.com. It's a ...

Though DAT files, which house data as the shortened name implies, are usually best left alone, here's how you can open them.

What is the deal with those winmail. dat files? I get them in my email all the time, and nothing seems to be able to open them.

What is Index.dat file? Where is it in Windows 11/10? Download free index.dat reader, viewer, analyzer. Learn how to delete index.dat file.

Another approach is to download a program that can translate the winmail.dat file. Several developers have created helpful programs that can open the files.

If the DAT file you're trying to open is text, you can convert the file into text in the Microsoft Excel program by first saving it as a CSV file.