Shameless plug, but here’s a live Graphviz editor in Observable:

https://beta.observablehq.com/@mbostock/graph-o-matic

And here’s a demo of dot tagged template literals:

https://beta.observablehq.com/@mbostock/graphviz

Having Graphviz at your fingertips is fantastic. I use it all the time for small networks where I don’t want to think too much about the layout and aesthetics. Here’s an interactive example:

https://beta.observablehq.com/@mbostock/how-observable-runs

Do you know python alternative for DiagrammeR? I've switched from R to python 5 years ago and dont want to come back

There's the graphviz lib [0] and also, somewhat confusingly, pygraphviz [1].

They are a bit different though, nicely summarised here [2].

[0]:https://pypi.org/project/graphviz/

[1]: https://github.com/pygraphviz/pygraphviz

[2]: https://stackoverflow.com/questions/37353199/graphviz-vs-pyg...

Looks nice. I was thinking I may have to learn TikZ to make professional looking diagrams, but this may do the trick.