Highlight Known Chinese Words is a popular language learning and teaching tool that you can use to learn more about the Chinese language. This utility will allow you to keep track of your knowledge of this writing system. It is extremely helpful, and it will help you to get to know the Chinese characters better. This tool will allow you to keep track of the words that you know and to create a simple dictionary in your own.

This extension will highlight the characters with green if you already know them and then red if you still don't.