Engineering magnetic materials into a thin film form while preserving its excellent magnetocaloric response is essential in the development of miniature magnetic coolers. We demonstrate how this can be achieved in the case of EuTiO3 – an emerging multiferroic material. Unlike conventional cases where reduced dimensionality considerably decreased the magnetic entropy change (ΔSM) and hence the refrigerant capacity (RC), we show the large low-field enhancements of ΔSM and RC in a ∼100 nm thick nanocrystalline EuTiO3 film (ΔSM ∼ 24 J kg−1K−1 and RC = 152 J kg-1 for μ0ΔH = 2 T) relative to its single crystal counterpart (ΔSM ∼ 17 J kg−1K−1 and RC ∼ 107 J kg-1 for μ0ΔH = 2 T). The nanocrystalline EuTiO3 film is an excellent candidate for cryogenic magnetic refrigeration. From our study, a new approach for improving both MCE and RC in magnetic nanomaterials is proposed, which will stimulate further research on magnetocaloric thin films and related cooling devices. •Engineering magnetocaloric materials on the nanometer scale is essential in the development of miniature magnetic coolers.•We demonstrate how this can be achieved in the case of EuTiO3 – an emerging multiferroic material.•We show the large enhancements of both ∆SM and RC upon applied moderate field changes (< 2T) in a nanocrystalline EuTiO3 film.•Our study shows the important roles of strain and reduced dimensionality in enhancing the magnetocaloric figures-of-merit.