How Chrome protects your passwords

Chrome can help you identify and change passwords that were compromised by data breaches so that your credentials remain secure. Your credentials include your usernames and passwords for sites or apps that you sign in to.
How password protection works

If you’re signed in to Chrome, Chrome can warn you if the username and password you use to log in to a website were involved in a data breach. This setting is turned on by default.

You can also use Chrome to check all of your saved credentials at the same time. Chrome checks your saved passwords and then lets you know if any of them were exposed in a data breach.

To check your credentials, Chrome first encrypts your username and password. Then it sends the encrypted credentials to Google for comparison against an encrypted list of known breached data. If Chrome detects a match between the encrypted sets of data, it displays a warning that prompts you to change your password. Google never learns your usernames or passwords during this process.

How we protect your data
When you log in to a website while signed in to Chrome, Chrome encrypts your username and password with a secret key known only to your device. Then it sends an obscured copy of your data to Google. Because the encryption happens before Google’s servers get the information, nobody, including Google, learns your username or password.
You're in control

You can check if a data breach exposed any of your saved usernames or passwords. You can also choose to get automatic warnings about credentials when you sign in to a site where a data breach was detected.

On your computer, to check your saved passwords:
  1. Open Chrome Chrome.
  2. Select More Organize and then Settings.
  3. Select Passwords.
  4. Select Check passwords.
On your computer, to get automatic warnings when there’s a data breach:
  1. Open Chrome Chrome.
  2. Select More Organize and then Settings.
  3. Select Security.
  4. Turn on Warn you if passwords are exposed in a data breach.

If you’re on a mobile device, learn more about how to check saved passwords and get automatic warnings.

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