To access any given file, you may need to convert it to a new format. For example, something your colleague created on a macOS word processor might not work on your Windows 10 computer.

This free Web service does one thing and does it well: changing your file formats instantly with no hassles.

You just need to select the file that you want to convert, right-click on it, and select File Converter. Now, you will see the available formats to which you can convert this file.

When it comes to converting file extensions on your iPhone, don't worry about downloading a third-party app when you can make the changes yourself.