Cybercrime targeting older adults has escalated in today's digital society. Digital literacy is crucial for reducing the risks of online fraud and harmful online experiences. This study investigated the relationship between digital media repertoires and digital literacy in online safety among Thai older adults aged 60 and above (n = 7,677). Drawing from nationally representative survey data, we employed logistic and ordered logit regression analyses to investigate whether different and more diverse digital media repertoires were associated with higher digital literacy in online safety and to identify which digital platforms are most effective in enhancing safety literacy. The findings revealed significant variation in digital literacy across different media repertoires, with a greater diversity of media use positively associated with higher safety scores. Productivity applications emerged as the strongest predictor of higher digital literacy in online safety, followed by social network services. Implications for digital literacy initiatives are discussed.