Set up iCloud Keychain

1. Tap Settings, tap [your name], then choose iCloud.
2. Tap Keychain.
3. Slide to turn on iCloud Keychain.
4. If you choose to "Approve Later" when signing into your Apple ID, you need to approve with an old passcode or from another device when prompted. If you are unable to approve, reset your end-to-end encrypted data when prompted.  

1. Choose Apple menu  > System Preferences. 
2. In macOS Catalina, click Apple ID, then click iCloud in the sidebar. In macOS Mojave or earlier, click iCloud.
3. Select Keychain.
4. If you choose to "Approve Later" when signing into your Apple ID, you need to approve with an old passcode or from another device when prompted. If you are unable to approve, reset your end-to-end encrypted data when prompted.  

If you can't turn on iCloud Keychain after following these steps, you might not be using two-factor authentication. Make sure you meet the minimum system requirements for iCloud Keychain and try these steps instead:

On your iPhone, iPad, or iPod touch: 

1. Choose Settings, tap [your name], then tap iCloud.
2. Tap Keychain and slide to turn it on.*
3. Follow the instructions on your screen.

On your Mac:

1. Choose Apple menu  and select System Preferences.
2. In macOS Catalina, click Apple ID, then click iCloud in the sidebar. In macOS Mojave or earlier, click iCloud.
3. Select Keychain.*

You might be prompted to create an iCloud Security Code—six digits, complex alphanumerics, or randomly generated—to authorize additional devices and verify your identity. If you forgot your code, you might be able to reset it.

*If two-factor authentication isn't set up on your iPhone, iPad, or iPod touch with iOS 13, or on your Mac with macOS Catalina, you are prompted to update to two-factor authentication.

1. Tap Settings, select Passwords & Accounts or Accounts & Passwords, then tap Website & App Passwords or App & Website Passwords.
2. Use FaceID or Touch ID when prompted.
3. To see a password, tap a website.

To delete a password, tap Edit. Then select a website and tap Delete.

1. Open Safari. From the Safari menu, choose Preferences, then click Passwords.
   
2. Enter your user account password.
3. To see a password, select a website. You can also add or remove passwords from iCloud Keychain. To change a password, select a website, click Details, change the password, then click Done.

iCloud Keychain stores credit card numbers and expiration dates—without storing or autofilling the security code—and passwords and usernames, Wi-Fi passwords, Internet accounts, and more. Developers can also update their apps to use keychain, if the app is on a device that uses iOS 7.0.3 or later, or OS X Mavericks 10.9 and later.

iCloud protects your information with end-to-end encryption, which provides the highest level of data security. Your data is protected with a key that's made from information unique to your device, and combined with your device passcode, which only you know. No one else can access or read this data, either in transit or storage. Learn more.

When you turn off iCloud Keychain for a device, you're asked to keep or delete the passwords and credit card information that you saved. If you choose to keep the information, it isn't deleted or updated when you make changes on other devices. If you don't choose to keep the information on at least one device, your Keychain data will be deleted from your device and the iCloud servers. 

Yes.* When you set up iCloud Keychain, skip the step to create an iCloud Security Code. Your keychain data is then stored locally on the device, and updates across only your approved devices. If you don't create an iCloud Security Code, Apple can't help you recover your iCloud Keychain.

*If you have two-factor authentication for your account, this does not apply.

No. If you enter your iCloud Security Code incorrectly too many times, you can't use that iCloud Keychain. You can contact Apple Support to verify your identity and try again. After several incorrect attempts, your keychain is removed from Apple's servers, and you need to set it up again.