The project will examine the effectiveness of online self-help. If research design is selected for a randomized controlled trial in which adult subjects with suicidal ideation through randomization will be assigned to the intervention group or a waiting list control group. If the investigation proves that the online module can be effective in reducing suicidal thoughts, this methodology will focus on this group of people with suicidal thoughts. The spacious and disseminate www.zelfmoord1813.be which the online module will be offered will be essential for a good range and will be worked out in the implementation plan.