WinchPass.
Bridge your iCloud Keychain to Windows.

Use your iPhone to fill out passwords on your PC.

WinchPass is a Chrome extension intended for users of iCloud Keychain that have a Windows PC.
It fills out passwords automatically and doesn’t keep any data.
It uses one-time pad encryption and QR codes to link your phone to Chrome.
Once the password is filled, the encryption key is discarded and cannot be reused.

Download from Chrome Web Store.