Catalyzes the hydrolysis of ester bond in chlorophyll to yield chlorophyllide and phytol. a chlorophyll + H2O = a chlorophyllide + H(+) + phytol Optimum pH is 6.6-8.6 for chlorophyll a hydrolysis, and 6.6-7.6 for chlorophyll b hydrolysis. Porphyrin-containing compound metabolism; chlorophyll degradation. Belongs to the AB hydrolase superfamily. Lipase family.