The way this works is by opening the Render deployment of this chat, simplistic-chat.onrender.com, in an iframe. To download this HTML file, click Code and select Download as ZIP. Then, unzip the folder, open it, and double-click on the file named chat.html.
Tip
This link is not always active. It will automatically restart upon any attempts to open it. If the link is just displaying a "Render" page, don't worry! Just keep reloading.
Note
This can bypass Securly.