What tools for online database structure design do you know?

Question

MySQL

You need a tool for designing database structures, so that you can look at home and at work, edit in one place. It doesn’t have to be a web solution, maybe some offline tools, desktop applications, what options are there? The main thing is that it's free and private)))

Answer 1

For MySql
I use it myself. Online, free, import to sql, open-source.