This randomized controlled trial evaluated the effects of a web-based alopecia education program on body image, self-esteem, chemotherapy-induced alopecia-related quality of life, and psychological well-being among women with breast cancer receiving chemotherapy. A total of 68 women were randomly assigned to the intervention or routine-care control group. Participants in the intervention group received access to a web-based educational and supportive care program throughout chemotherapy, whereas participants in the control group received routine care. Outcomes were assessed at predefined time points before the first, second, and final chemotherapy cycles.