Comment by tommsy64

Foreman 2.0 https://github.com/DanielKote/Foreman2 is robust Factorio diagramming app. It's capable of creating rather large diagrams, such as this [1] one of an entire Seablock factory.

Another one I like to use for quick diagramming is Factorio Lab [2], which is a web app.

[1] https://www.reddit.com/r/Seablock/comments/r0w0nl/full_graph... [2] https://factoriolab.github.io/