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.

You can create a file without a File Type Extension in Windows 11/10 by carefully following the steps laid down in this post.

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.

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.

How to change the default program a file opens with in Windows 7 When you open files that have a particular file extension, Windows will look at its configuration to determine what the default ...

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 ...

CSV files are special text files that are quite common when dealing with spreadsheets. Here's how to open and make them.