Hi!
Try my project, Mqtt-np — a web-based MQTT client.
It can connect to both cloud and local brokers via the WSS protocol. For local brokers, just add the certificate to your browser storage.
You can view logs or create widgets from topics. The app also supports Google authentication and synchronization across your devices.
As it is it appears to have limited relation to Home Assistant, at least maybe HAOS.
I would suggest perhaps provide some examples on set-up and use with Home Assistant specifically otherwise it’s a bit off topic.
If you use zigbee2mqtt or other automation that sends data through an MQTT broker, I think this will be useful for you for debugging and data monitoring.
OK, so it’s a monitoring tool kind of thing. OK. It was looking to me like a broker. OK, that is useful then.
Since it supports widgets, it could be used as a basic frontend UI.
For better usability, I added tabs that allow you to organize different widget sets for the same server.
