I will give you a professional HTML editor.
That is a real time HTML editor.
You are seeing the result while you are writing.
In addition, this HTML editor includes many special features.
For example you can :
1) import a library, like Jquery or Jquery-ui.
2) Create an element.
3) Open the result in a new window.
The result is very precise. There are no mistakes.
The editor is very comfortable, and it's very easy to use.
There are many additional features.