This study investigates the rapid biological synthesis of silver nanoparticles using five plant leaf extracts: Pine, Persimmon, Ginkgo, Magnolia, and Platanus. The plant leaf extracts were used as reducing agents to convert Ag⁺ ions to Ag⁰, forming stable silver nanoparticles. UV-visible spectroscopy was employed to monitor the quantitative formation of these nanoparticles. Magnolia leaf broth was found to be the most effective in terms of synthesis rate and conversion efficiency, achieving over 90% conversion in just 11 minutes at 95 °C. The synthesized nanoparticles were characterized using various techniques, including ICP, EDS, SEM, TEM, and particle analyzer, revealing an average particle size ranging from 15 to 500 nm. The synthesis rate and particle size could be controlled by adjusting the reaction temperature, leaf broth concentration, and AgNO₃ concentration. This environmentally friendly method offers faster synthesis rates comparable to chemical methods and has potential applications in cosmetics, foods, and medical fields.This study investigates the rapid biological synthesis of silver nanoparticles using five plant leaf extracts: Pine, Persimmon, Ginkgo, Magnolia, and Platanus. The plant leaf extracts were used as reducing agents to convert Ag⁺ ions to Ag⁰, forming stable silver nanoparticles. UV-visible spectroscopy was employed to monitor the quantitative formation of these nanoparticles. Magnolia leaf broth was found to be the most effective in terms of synthesis rate and conversion efficiency, achieving over 90% conversion in just 11 minutes at 95 °C. The synthesized nanoparticles were characterized using various techniques, including ICP, EDS, SEM, TEM, and particle analyzer, revealing an average particle size ranging from 15 to 500 nm. The synthesis rate and particle size could be controlled by adjusting the reaction temperature, leaf broth concentration, and AgNO₃ concentration. This environmentally friendly method offers faster synthesis rates comparable to chemical methods and has potential applications in cosmetics, foods, and medical fields.