Webinar activities that are carried out online allow a large number of participants from various origins, so manual management will be very troublesome for the organiser. The development of web-based applications allows developers to build applications quickly and easily. In the development stage of the web-based application, the first step that must be done is to create an application development design. The design of the application is based on the needs of the application manager which we can get from various ways such as studying related documents, interviews or literature studies on similar research. This research will conduct a needs analysis and apply it to the design of an application that will be used by webinar managers whose aim is to facilitate the process of managing webinar activities from the process of scheduling activities, registering participants to printing webinar certificates which can be done independently by the webinar participants.

The increasing number of internet users along with the development of technology is increasing, the current webiste service users have been used by anyone and in all fields. Various sites about education, entertainment, mystical even violent scenes and pornography are things that are impossible not to find on the internet. More and more sites that are not educating at this time make parents have to be more careful and wise in supervising their children who are still under 17 years old in using internet facilities. In this study, a parental control system will be designed and built that utilizes a proxy server on a network which can later be implemented on an internet network at home. The type of research in this research is research and development to carry out system development. With this system, it is hoped that parents can be calmer at work or outside the home and their children can monitor all their activities on the internet from those that are less suitable for the child to visit.