Scan a QR code in a web browser on your Windows computer
If you set up two-step verification or two-factor authentication on a website, you have to enter a verification code to sign in to your account. Some websites allow you to get a verification code by scanning a QR code. If you’ve set up iCloud Passwords in iCloud for Windows, you can scan the QR code on the website and receive the verification code on your PC, without the need for a camera or separate authenticator app.
Note: iCloud Passwords only works in Chrome on computers that have iCloud for Windows. It doesn’t work in Chrome on a Mac.
Make sure the iCloud Passwords extension is enabled
You need to enable the iCloud Passwords extension to scan QR codes. If the extension is enabled, 
is shown in the browser’s toolbar. If 
is shown, see Enable the iCloud Passwords extension.
Automatically scan a QR code
In Chrome or Edge on a Windows computer, go to a website that allows you to receive a verification code by scanning a QR code.
Do one of the following:
Right-click the QR code, then click Set Up Verification Code.
Click the iCloud Passwords button in the browser’s toolbar, then choose your account below “Set up verification code for.”
In the iCloud Passwords app window that appears, sign in if necessary, choose your account for the website, then click Add Verification Code.
In Chrome or Edge, go back to the website, click in the verification code field, then choose the verification code.
You can also copy the verification code from iCloud Passwords.
Manually add a QR code key
In Chrome or Edge on a Windows computer, go to a website that allows you to receive a verification code by scanning a QR code.
Copy the QR code key. (It usually looks like a long string of numbers and letters.)
Click your account for the website, then click
.Paste the key into the “setup key” field, then click Save.
In Chrome or Edge, go back to the website, click in the verification code field, then choose the verification code.
You can also copy the verification code from iCloud Passwords.