Abstract Facilitating direct citizen participation through online channels is considered as an opportunity for including harder to reach groups in participation. Because young adults (18‐25) are heavy internet users, this group is expected to be easier to include online. Evidence shows, however, that also in online direct participation young adults remain underrepresented. To better understand this discrepancy from the perspective of participants, this research asks how young adults explain their intention to participate online. Thematic analysis highlights that young adults' intention to participate in online direct participation can be explained through: (1) cause‐oriented participation, (2) the role of social (media) networks, (3) selective attention to cope with information overload, and (4) navigating misinformation and negativity. In the discussion section, this article considers how these explanations can inform government strategies for better including young adults in online direct participation.