Learn how to change, restore, set or fix change file associations and extensions in Windows, using Control Panel or Types free tool.

We show you multiple ways using which you can change File Type.r Extensions or Format on Windows 11/10. You can also use the Command Prompt.

Normally, if you change a file’s extension in Windows, it doesn’t do anything positive. It just makes the file open in the wrong programs that can’t decode what’s inside. Ho… ...

If you’re tired of Windows opening files in the wrong apps, changing file associations may fix the problem. Here’s how to do it.

Just type in your filename and extension surrounded by quotes e.g. "cart.php" You don't need to hit the combo box and change it and you won't get cart.php.txt when you go looking for the file.

There's another way you can change a file type's associated app in macOS: Right-click (or Ctrl-click) on the file in a Finder window and select Get Info.

The third column, Current Default, shows you the application that currently handles the associated file extension. Click "Change Program" to bring up the Open dialog window.

If your aim is to manage how Google Chrome associates files, on the other hand, you can focus on disabling -- or installing and enabling -- associated Chrome extensions instead.

Mac 911 MacOS: How to change the default app for a file Only file types associated with applications receive automatic mappings.