Hidden inside the Mac Utilities folder, Keychain Access provides access to the passwords and other private information saved through your Mac’s keychain.
If you think managing your passwords on the Mac is limited to Safari, you’ve never explored the Keychain Access utility. With Keychain Access, you can review, change, delete, and create passwords for your online accounts and examine security keys and certificates and add password-protected notes.
First, you’ll need to make sure that iCloud Keychain is enabled. Open System Preferences, click the icon for Apple ID, and click the checkbox for Keychain. Then when you browse to a password-protected website, iCloud Keychain will ask if you want to save the password. Click Save Password and it’ll be securely stored in your Keychain
Read more at Macworld.com