Google Keyword Planner is completely free, but you need a Google Ads account to use it. Follow the steps below to search for keywords without spending a dime: 1. Go to the Google Keyword Planner page and click “Get Google AdSense” if you haven’t got an account yet. 2. Register with your Google account. 3. Go back to Keyword Planner and start your search – you don’t have to create a campaign to do that.