One of the key benefits of using 1Password is to replace your old, re-used, easy-to-guess passwords with new, strong, unguessable passwords.
Step 1: Use your existing Login to log in to the web site.
Follow the steps in Using a saved login to log into the site.
Go to the site’s “change password” form. This is typically under My Account, Settings, or something similar. In our example, to change our password in Gmail, click on the photo icon in the top right hand corner of the browser, then click on Account.
Next, select the Security tab and click on Change password.
Step 2: Specify your old password
Some (but not all) sites will require you to enter your old/current password before being allowed to change it to something new. You can easily copy it from 1Password into the “current password” field on the form.
Click on the 1Password button on your browser’s toolbar. If 1Password recognizes the site you’re on because the URL matched, the login will appear at the top (as it does in this example), or if not then click on Logins, then find the login for this site. Hover over the dots to the right of the word password with your mouse, and click Copy. Make sure you are clicking the Copy button next to the password field, not the username field.
Next, in the browser on Gmail’s change password form, click in the “Current password” field and press ⌘V on your keyboard to paste your password.
Step 3: Generate a new password
In your browser on Gmail’s change password form, click in the “New password” field.
Next, click on the 1Password button on your browser’s toolbar, and choose Password Generator. 1Password will automatically have generated a new password for you which it displays. Click on the little down arrow icon next to the words “Password Recipe” to use the controls to create exactly the kind of password required by the site. When you are satisfied with the generated password, click Fill.
1Password should enter the strong password into the “New password” and “Confirm new password” fields; otherwise, you can paste it in yourself. Click Change Password to save your new Gmail password.
Step 4: Update your existing Login in 1Password
Accept 1Password’s offer to update the password field in your existing Login for that site by clicking Update.