Each category of file type has many file formats according to their compression level or other factors. The programs recognize the files by their format and open them.

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.

Disabling File-Type Warnings Close the program you are using to open the file that gives you the "Always ask before opening this type of file" message, if it's currently running.

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

Red Eye Rose received a file with a strange extension. She doesn’t know into what program she should load it. Neither does Windows. I doubt that anyone knows all of the file extensions used ...

You can add a new file type to the New item section of the Windows 10 Context Menu, but you will have to edit the Windows Registry. Here is how you do it.

Mac OS X computers use a default application to open every file type based on its file extension. If you don't want to use the default application when opening a file, you can select "Open With ...

How to open a file with a different program on your Mac When you double-click a file on your Mac, the operating system will automatically open the file using the program assigned to that type of ...