The study considers the effect of the Internet resources on adolescents. The positive effect of the Internet on adolescents is revealed, and the negative effect is substantiated. Most teenagers aged 12-15 use the Internet daily, using the Internet from home or mobile networks. 'The Internet is not just something children turn to when they need certain bits of information; it is an integral part of the world in which they live.' The Internet platform can be defined as a dystopian perspective for the future. In most cases, the Internet resources displace other useful activities such as reading, playing sports, communicating with friends and family, and expose adolescents to potentially rough and negative content, sexual and commercial exploitation. On the Internet, adolescents may encounter dangerous content, including violence, aggression, pornography, materials promoting various forms of antisocial behavior, and destructive groups. The Internet has a negative effect since it often changes time usage patterns. In addition, the Internet provides access to online games and social media, which are commonly used by adolescents. Moreover, distribution of the rough content, fake news and inappropriate sexual or violent content on the Internet can have a tremendous effect on the worldview and behavior of adolescents. The authors identify two theories that confirm a negative effect of the Internet on the psychological state of adolescents and their social behavior. The theories of social comparison and cyberbullying are considered.