I’ve been a KeePass user for over a decade and it’s always been good to me, especially when using Box and OneDrive to sync it between devices. The ecosystem is great with enough plugins and support to make it fit your use case on any modern OS.

Can’t recommend it enough. Especially over other options that are offered by a commercial company (LastPass for example). Not only because you’re intently placing your trust in them to not expose your data and keep it secure, but also because you’re giving them a lot of leverage to turn around and hold your passwords for ransom at some point in the future (when they IPO for instance, as a popular example) or lock you out after they fold for whatever reason.