Zeolite crystallization involves complex and overlapping kinetic and thermodynamic processes, posing significant challenges to achieving precise control, especially during short crystallization periods. Microwave-assisted heating has proven effective in acceleration of zeolite crystallization from gel growth media, but its application to synthesis by interzeolite transformations is unknown. Herein, microwave-assisted heating is introduced as a method for interzeolite transformation demonstrating transformation of FAU zeolite to CAN, ANA, EDI, and MER zeolites. The microwave approach ensures interzeolite transformations within 5-10 min, which is tenths of times faster than transformations by conventional heating. This work also shows how at identical synthesis conditions the concentration of KOH directs the structure of the run product. Furthermore, the temperature control of the interzeolite transformation allows the production of pseudomorphic hierarchical particles of FAU zeolite in just 10 min without using any templating additives.