LastPass User Manual An easy to understand guide on how to use LastPass.

Changing an Old Password to a Generated One

If you stored login details that you created before you began using LastPass, we recommend that you run the LastPass Security Challenge to identify potentially weak passwords. Once identified, you may want to change your old password to one randomly generated by LastPass.

You may also like to periodically update your passwords; LastPass tries to make this process as simple as possible for sites that you have stored in your Vault.

Replacing Your Old Password

We'll use a demo Gmail account to show how to update a stored site with a new, generated password from LastPass.

To begin, login to the target site and access the account settings or preferences page where you can change your password:

When you launch the 'change password' page, you will usually be asked to enter your old password, with a new password entered twice. When you focus on the 'Old password' field by clicking on it, LastPass should prompt you with a notification to fill in your current password for the site:

After clicking 'Fill Current' and autofilling the password, you can then click 'Generate' to create a random, unique password:

Click 'Accept' to store the newly generated password and autofill both the 'New password' and 'Confirm new password' fields:

Now click 'Save' to submit the changes to the website. After clicking 'Save', LastPass will prompt you to either 'Confirm' or 'Save New Site':

By clicking on 'Confirm', you will tell LastPass to swap the old password for the entry with the new, generated password. 'Save New Site' creates an entirely new entry for the site with your previous username and new, generated password.

If you choose not to confirm or save as a new site, the generated password will have its own entry in your Vault.

The next time you login to your site, LastPass will autofill with the new, generated password!

If LastPass does not recognize the change in password when you submit it, you can simply

  • Sign out of the site
  • Go to the login page for the site
  • Use LastPass to enter your username
  • Copy/paste the password from the 'Generated Password' entry that was stored when you accepted the new password
  • Click login

You will then be prompted by LastPass to accept the changes to the site's entry, and now the new password will be stored with the entry in your Vault.