This guide provides instructions on how to set up the Apple iCloud Keychain password manager.

Apple iCloud Keychain remembers entries, auto-fills usernames and passwords in Safari and other apps, passcodes, credit card information and security codes, and Wi-Fi passwords on all Apple devices.

NB! Apple iCloud Keychain password manager can only be used on Apple devices.

The University of Tartu recommends:

export all passwords from web browsers before using a password manager (check Export and import passwords)
when creating a password management software account, make sure you create a password that is sure to be remembered, but still secure (check KeePassXC Password Generator)
do not use the same password in different places (check Stop using the same password on multiple sites)

Additional information: Apple iCloud Keychain data security overview.

About Apple iCloud Keychain

Pros:

User-friendly interface and easy to set up
Supports multi-factor authentication
Auto-fills passwords on websites and apps
Syncs across devices
Smart device applications available
Safari, Chrome, Firefox and Edge extensions are available

Cons:

Can only be used with Apple devices
No option to use offline

Summary: Keychain is best suited for users of the Apple ecosystem. It is preinstalled on any Apple device. Keychain is easily accessible on Mac and iOS devices and also supports multi-factor authentication. Keychain syncs across all Apple devices and allows for secure storage and sharing of various authentication credentials.

secure password vault for storing user IDs and passwords (check iCloud data security overview)
autofill (check Set up iCloud Keychain to autofill information on Mac and Automatically fill in strong passwords on iPhone)
strong suggested password generator for creating passwords (check Create a strong password for a new account in iCloud)
two-factor authentication (check AppleInsider: How to set up two-factor authentication in iCloud Keychain)
biometric authentication (check Accessing Keychain Items with Face ID or Touch ID)

Setup

NB! On your iPhone, iPad, or iPod touch with iOS 13 or later, or on your Mac with macOS Catalina or later, two-factor authentication is required to turn on iCloud Keychain. If you haven't set it up yet, you're prompted to update to two-factor authentication.

Open the Apple menu → System Settings (or System Preferences).
Click on your name, then select iCloud. In earlier versions of macOS, click on your Apple ID, then click iCloud in the sidebar.
Turn on Password & Keychain.

Open Settings, click on your name and choose iCloud.
Choose iCloud.
Tap Passwords and Keychain.
Turn on iCloud Keychain. You might be asked for your passcode or Apple ID password.

View passwords and access keys

Choose Apple menu→ System Settings. In macOS Monterey, choose Apple menu→ System Preferences.
Click Passwords.
Sign in with Touch ID, or enter your user account password.
Select a website, then click the Show Details button . In macOS Monterey, click Edit.
- To delete a password, click Delete Password.
- To update a password, change it and then click Save.

Open Safari.
From the Safari menu, choose Settings (or Preferences), then click Passwords.
Sign in with Touch ID, or enter your user account password.
Select a website, then click Edit.
1. To delete a password, click Delete Password.
2. To update a password, change it and then click Save.

You can also use Siri to view your passwords by saying something like "Hey Siri, show my passwords."

Open Settings, then select Passwords. In iOS 13 or earlier, select Passwords & Accounts, then tap Website & App Passwords.
Use Face ID or Touch ID when prompted, or enter your passcode.
To see a password or passkey, select a website or app.
1. To delete a saved password or passkey, tap Delete Password or Delete Passkey.
2. To update a password or passkey, tap Edit.

iPhone - https://support.apple.com/en-us/HT204085 & https://support.apple.com/en-us/HT211146

Mac - https://support.apple.com/en-us/HT204085 & https://support.apple.com/en-us/HT211145