Check 404 errors in Webmaster Tools December 1, 2014 Google Resources 1. Log in to your Google Account 2. Visit Google Webmaster Tools: https://www.google.com/webmasters/tools 2. Find your website and click on the URL 3. Once your website information loads. Look on the left hand side to find Crawl –> Crawl Errors 4. After you click on Crawl Errors scroll down to below the graph and you will see the errors that appear.