We've disabled publishing on https://HTML.house due to an excessive number of phishing pages getting published.
In the meantime, you can still use the editor to try out some HTML and preview it in real time!
You may see a "deceptive site" warning when navigating to https://HTML.house right now. We've removed the problematic page and notified Google, so hopefully this should go away soon.
In the meantime, you can click "Details" and "visit this unsafe site" in Chrome (or "ignore the risk" in Firefox).