Go to https://accounts.google.com/signin
Sign in to the Google account you want to sign out of
Click your profile picture or initial in the top-right corner
Select Sign out
If you’re signed in on multiple devices or browsers, go to https://myaccount.google.com/
Scroll to Security
Under Your devices, select Manage all devices
Select the device you want to sign out from
Select Sign out
To sign out everywhere at once, go to https://myaccount.google.com/
Scroll to Security
Under Your devices, select Manage all devices
Select Sign out on all devices
Confirm when prompted