There is a lot of free software out there that allows you to make HTML5 but from what I've seen, Wick Editor is much easier and quicker to work with. IMO, of course.
Viewing post in Nico Robin (One Piece) Runner-up Animation comments
Browser, I have the desktop one as backup but the browser version is more stable. I specifically use this vers. >>> https://www.wickeditor.com/test/