Adolescents are a vulnerable group when it comes to mental health issues like suicidal ideation. Digital health, with its increasingly advanced and developing technology in industry 4.0 area, can be an alternative intervention to prevent or even reduce suicidal ideation among adolescents. This article is a literature review that aims to discuss the use of digital health interventions to reduce suicidal ideation among adolescents. The article search method uses a database from Pubmed, Google Scholar, Science Direct, and CrossRef. There were 12 articles that were reviewed. The findings indicated that a digital health intervention can reduce or eliminate suicidal ideation in adolescents. The internet, websites, mobile applications, and messenger are all examples of digital health. The influence of digital health interventions for suicidal ideation comes from benefits of digital health such as screening for suicidal ideation (both by health workers and independently), counseling, psychoeducation, and peer support. Digital health can be used effectively by millennials or teenagers who live in modern times.