Google’s Safe Browsing tool examines billions of URL addresses per day to identify unsafe sites. Google discover thousands of previously unidentified unsafe sites every day, many (unfortunately) of which are 100% legitimate websites that have been infiltrated by a bug, a virus, or some other miscuous software. When Google detects these unsafe sites, they show warnings on Google Search and in website browsers. Use this tool to confirm that your site is currently safe to visit according to Google.