If you are a normal human being then bitwarden is currently the best option. If you are into computer shit you can use keepass, which has clients on all platforms but you will have to figure out how to sync your keepass database across devices. Or if you are like me who uses esoteric solutions because it is a thin thread by which my individuality hangs then you can use passwordstore.org, which has worked fine with me on windows, linux and android.