- A File extension defines the type of the file. Basically, it is the suffix at the end of the file name, for example: ‘quehow.pdf’, here “.pdf” is the extension for the PDF format. In the same way you can use.html,.jpg,.tiff,.png, etc for different scenarios. Steps to Change a File Extension in Windows 10. Step 1: Select a file which.
- Welcome to the Microsoft Answers Forum. Usually.dat files can be open with Notepad or with Microsoft Word. Have you tried using any of these? Just save the.dat file to a destination of your choice and right click on it and click Open with and choose either notepad or Winword, if you only see the choice to just use Open when you right click.
What Is a DAT File?
How Do I Open a DAT File?
Using a Text Editor
How-to Open Winmail.dat Files
File Extension Dat Microsoft Ms
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File Extension Dat_old
In Windows 7, you have to click on the Organize button and then click on Folder and Search Options.
In Windows 8, click on the View tab and then check the File name extensions box.
Except for Windows 8, you’ll need to click on the View tab next and then scroll down to the option “Hide extensions for known file types” and UNCHECK it. In this way, we’ll now be able to see the file extension and change it to something else.
If you’re still not able to determine the file type using Notepad or the hex editor, you can go at it with a brute force attack. Basically, right-click on the DAT file, choose Open With and try as many programs as you can find. For testing, I changed one of my Excel files to a .DAT extension, right-clicked on it, choose open with Excel and it worked!
Now Windows was actually smart enough to figure out that the file was an Excel file even though the extension was incorrect because it gave me Excel as the top recommended program.
You should also try programs like VLC for any type of possible video or music file and a photo viewer in case it’s an image, etc. So hopefully you are now able to open your mysterious .DAT file using one of the above-mentioned methods! If not, post a comment and I will try to help! Enjoy!