Clean Slate for Kids Online Act of 2019 This bill requires the operator of any website or online service directed to children to provide notice on the website about how an individual over age 13, or the guardian of an individual over age 13, can request the deletion of all personal information in the operator's possession collected when the individual was a child; promptly delete, upon request, all such personal information; and provide written confirmation of such deletion. The bill allows a limited exception to the deletion requirement if the personal information collected from or about a child is necessary to respond to judicial process or to provide information to law enforcement agencies.