My own quick and easy Mermaid diagramming page I knocked up a few years ago and stuck on Netlify, and which I (and a few others) use very frequently: https://s

My own quick and easy Mermaid diagramming page I knocked up a few years ago and stuck on Netlify, and which I (and a few others) use very frequently: https://sequence-diagrams.netlify.app https://sequence-diagrams.netlify.app Note the credit on that page to bramp.github.io who did the hard work with the JS library it uses. And when you find UI issues remember it was a quick tool knocked up years ago and forgive me.