Our project seeks to augment the existing Blacklight tool to enable users to compare current and previous ‘scans’ for a website, so that users are cognizant of how companies manage their data and are better equipped to take steps to secure it. The Blacklight Archiver, a product of tech publication The Markup, enables users to easily track online surveillance. By providing users with point-in-time comparisons of cookie-based website trackers, Blacklight users are able to see which websites are the largest surveillance offenders. This publicly-available product is useful to journalists and consumers alike.