I think https://kroki.io/ deserves its own submission.

Your wish showing up in the face of a submission just 14 days ago and then another 29 days ago must be indicative of why there are so many dupes all the time: https://news.ycombinator.com/from?site=kroki.io

You can feel free to submit the GH repo, as that one doesn't seem to have been submitted before https://github.com/yuzutech/kroki

This is great, thank you. I wish there was a way to activate "zen mode" in the URL so that it could be bookmarked