looking for free tool to generate java class model diagram

Does anyone know of a free tool that can generate a class diagram for a java project (on windows or linux)? I’m using idea intellij community 2020.3.2 and I know the ultimate version has this functionality, but right now I don’t have a licence and don’t want to buy one just for this one-off. I just need a basic class diagram, something simple would do, but I haven’t found any plugin or independent tool that can do this automatically. Anyone have any thoughts? Many thanks!

just saw this on my search, maybe that’s what you are looking for