Pure pullulan films exhibited lowest differential entropy values at a high moisture content range, whereas pure alginate films showed the lowest differential entropy values with increasing moisture content from 0.05 to 0.17 g/H2O g dry basis. Net integral entropy values for pullulan, alginate and blend films were observed to decrease to each minimum value, and then increase with moisture content increases. Moreover, according to the enthalpy-entropy compensation theory, the sorption mechanism for all tested films was enthalpy-controlled. The thermodynamic information obtained from this study is essential for designing equipment and standardized drying process for pullulan-sodium alginate based edible films.