This tool is great. I used it for diagrams[1][2] in my SICP project after trying lots of alternatives. It was the only one that allowed me to reach my goal of having pristine source that stands on its own, but also renders to a nice web page. I also use svgo and do some custom post-processing[3] to simplify the output.

[1] https://mk12.github.io/sicp/text/2/2.html#2.2.1 (generated from https://github.com/mk12/sicp/blob/master/notes/text.md#221-r...)

[2] https://mk12.github.io/sicp/exercise/2/2.html#ex2.42 (generated from https://github.com/mk12/sicp/blob/master/src/sicp/chapter-2....)

[3] https://github.com/mk12/sicp/blob/master/notes/pandoc/render...