 The internet overcomes some of these barriers, as it can be used independently of time and location. Internet-based therapies are therefore a growing field of interest in research and there is evidence for treatment efficacy for several psychological disorders. Moreover effect sizes of traditional face-to-face and interactive web-based interventions are comparable. However, web-based interventions for cancer patients are still scarce. The present research project therefore develops a comprehensive stress management program accessible for a vast number of cancer patients. The study targets primarily to evaluate the feasibility of the program technical, organizational feasibility, accessibility. In addition, the preliminary efficacy of the program will be analyzed in order to adapt future programs for specific patient groups. 