[stavros]

Hm, I wasn't aware of this web interface. Is it some sort of management panel? Do I have to deploy it on prem?

[Nextgrid]

I think he's talking about the ESPHome web app - it's a Python app you run on a server which provides a web-based IDE to manage your ESPHome devices.

To be clear, it is not hosted by the ESPHome devices themselves, it's a separate component.