How to visualize and manage long and complex Node-RED flows?

This troubleshooting guide describes what it is needed when loosing the overview over Node-RED flows


I have a very large Node-RED flow. It is very confusing to navigate through it.


A big point about structuring is not to make the flows too long and not too complicated (and especially not to store states in Node-RED).


  • Always pulling data from MQTT / Kafka
  • Doing small processing and then writing the result back (if it still makes sense in terms of content).

For example:

  1. A flow just for data extraction.
  2. Then a flow that processes the raw data.
  3. Finally one that does something with it again (e.g., execute actions).

Extra: this is described in the following video

Last modified October 5, 2022: Historian article (#107) (5f30dc0)