 Morinda tinctoria leaf extract was used to reduce silver ions into silver nanoparticles, which were then characterized by UV vis spectrophotometry, SEM, XRD, EDX, FTIR, and photodegradation of methylene blue. The results showed that the synth-sized silver nanoparticles had good dispersion and morphology, as well as crystallinity and purity. Additionally, the green synth-sized silver nanoparticles exhibited excellent photocatalytic activity in degrading methylene blue under sunlight irradiation.