A computer-implemented method for certifying client-side security for Internet sites may include 1) identifying an Internet site that is subject to a security evaluation, 2) retrieving at least one resource from the Internet site, 3) parsing the resource to determine that the resource includes at least one client-side security policy for an Internet client to enforce on the Internet site, and 4) certifying the Internet site as providing client-side security based on determining that the resource includes the client-side security policy. Various other methods, systems, and computer-readable media are also disclosed.