https://no-gravity.github.io/html_editor/
This has the benefit that you can also edit the html afterwards.
It also has the function to render the HTML into an image (Via the "Render" button). I wonder if one could feed that image back to ChatGPT to provide visual feedback on what it coded? Maybe it would reply with "Oh, now that I see it, let's make the margins on the header a bit smaller and the background a bit more colorful" :)