Objective: To investigate the effects of an online wellness intervention on college students' self-efficacy, intentions to seek help, general resilience and whether adverse childhood experiences (ACEs) act as a moderating variable. Participants: Three-hundred and eighty-two undergraduate students. Method: Students were assigned to two conditions: treatment or control. The treatment group participated in an online intervention designed to enhance student wellness, the control group did not. Both groups completed an online questionnaire. Results: Students exposed to the intervention reported greater self-efficacy, a higher likelihood to engage in self-help activities and greater intention to use campus resources. Additionally, among students with more ACEs, those who were exposed to the site were more likely to recommend resources. Conclusion: The online intervention presented here may be an effective tool to reduce barriers for students seeking help for mental health and may increase student wellness.