Catalyzes the hydrolysis of ester bond in chlorophyll to yield chlorophyllide and phytol. a chlorophyll + H2O = a chlorophyllide + H(+) + phytol chlorophyll a + H2O = chlorophyllide a + H(+) + phytol Inhibited by diisopropyl fluorophosphate (DFP), phenylmethanesulfonyl fluoride (PMSF) or p-chloromercuribenzoic acid (PCMB), but not by N-ethylmaleimide (NEM) or iodoacetamide. Porphyrin-containing compound metabolism; chlorophyll degradation. It has been proposed that CaCLH0 is transported to vacuole via the endoplasmic reticulum where it might be glycosylated. Belongs to the AB hydrolase superfamily. Lipase family.