Dynamic scaling of swift heavy ions induced cracks in the nanodimensional BaF2 thin films is studied using 100 MeV Au+8 ions at different ion fluences. Atomic force micrographs show that, up to a fluence of 1×1012 ions/cm2, the surface morphology is almost unchanged from virgin film, but thereafter, the formation of cracks is seen. The dimensions and density of the cracks is found to increase with increase in ion fluence. Dynamic scaling of surfaces demonstrates that the surface roughness exponent (α) values are in the range of 0.2–0.5. The growth exponent values are found to be β=0.10±0.03 and 1.1±0.1 for continuous and cracked surfaces, respectively. Shift of X-ray diffraction peaks after irradiation indicates contribution of tensile stress in the crack evolution with ion fluence.