Cocoa pod husk (Theobroma cacao l.) is a waste from cocoa beans processing. In this research we employ cocoa pod husk as activated carbon to decrease the value of FFA (Free Fatty Acid) in waste cooking oil and as K 2 CO 3 catalyst in biodiesel production process from waste cooking oil. Cocoa pod husk was crusched and grounded into powder that passed thorugh 60 mesh-screen. As activated carbon, cocoa pod husk was firstly carbonized at three variant temperatures ie 250 C, 300 C and 350 C. The activation process was done using HCl 2M as activator. Based on the results of XRD and FTIR, the carbonization at all variant temperatures does not cause a significant changes in terms of crystallite structure and water content. The pore of activated carbon started to form in sample that was carbonized at 350 C resulting in pore diameter of 5.14644 nm. This result was supported by the fact that the ability of this activated carbon in reducing the FFA of waste cooking oil was the most pronounced one, ie up to 86.7% of FFA. It was found that the performance of cocoa pod husk's activated carbon in reducing FFA is more effective than esterification using H 2 SO 4 which can only decrease 80.8%. On the other hand, the utilization as K 2 CO 3 catalyst was carried out by carbonization at temperature 650 C and extraction using aquadest solvent. The extraction of cocoa pod husk produced 7.067% K 2 CO 3 catalyst. According to RD results the fraction of K 2 CO 3 compound from the green catalysts is the same as the commercial (SAP, 99%) that is≥ 60%. From the obtained results, the best yield percentage was obtained using K 2 CO 3 catalyst from cacao pod husk extract, ie 73-85%. To cope with biodiesel conversion efficiency, a two-step process consisting pretreatment with activated carbon carbonized at 350 C and esterification with K 2 CO 3 from cocoa pod husk catalyst was developed. This two-step process could reach a high conversion of 85%. From the results it was clear that the produced biodiesel fuel was within the recommended SNI 7182: 2015 standard.