Azimutt is an online-only, non free tool. If you don’t want to publish your design or need to analyze someone else’s design, this is a no-go for me. (Skimming it it promises to be able to work only in the browser if you want to, personally I wouldn’t risk it)
Check out https://schemaspy.org/, which creates a documentation locally, if the original project here doesn’t work for you.
