Also, while I hear the "browser based" in your question, be aware there is a plugin for the JetBrains tools that gives instant feedback, which can speed up the

Also, while I hear the "browser based" in your question, be aware there is a plugin for the JetBrains tools that gives instant feedback, which can speed up the "development cycle" for PlantUML diagrams: https://plugins.jetbrains.com/plugin/7017-plantuml-integration https://plugins.jetbrains.com/plugin/7017-plantuml-integrati... and https://github.com/esteinberg/plantuml4idea#readme https://github.com/esteinberg/plantuml4idea#readme Regarding mermaidjs, I draw attention to the fact that GitLab's markdown language supports it, which is incredibly handy in MR descriptions or wiki pages: https://docs.gitlab.com/ee/user/markdown.html#mermaid https://docs.gitlab.com/ee/user/markdown.html#mermaid