[SanderSantema]

Just to add to your comment:

A safe way to rate your password on MacOS is to use the Keychain Access app. Generate a new password by pressing cmd-n and than fill in your current password or a new password you'd like to use. It even includes a function to automatically generate passwords, automatically generating passwords online isn't something I'd like to do either. I either make them up from random text, which I see online & offline, or I use the Keychain Access app.

Besides the native Keychain Access app all other decent third party password managers include a way to automatically generate safe passwords. This makes online tools redundant, unless they've been made with another purpose in mind like practicing coding or possibly malicious intents.