Microsoft Frontpage was replaced by Expression Web, which is now retired, but still available and very usable for this task.

Download Expression Web 4 here:
https://www.majorgeeks.com/mg/getmirror/microsoft_expression_web,1.html

However, any available, free HTML editor will do the job just fine. Here's a few for you to try.

CoffeeCup HTML Editor - https://www.coffeecup.com/html-editor/
Apache NetBeans - https://netbeans.apache.org/
Notepad++ - https://notepad-plus-plus.org/

Or you can use this Google search for more options:
https://www.google.com/search?q=html+editor+free