In the title compound, C(13)H(11)N(3)O(2), an intra-molecular O-H⋯N hydrogen bond generates an S(7) ring. The dihedral angle between the mean plane of the benzene ring and the imidazolidinone ring is 3.05 (2)°. In the crystal, inversion-related mol-ecules are linked by dual C-H⋯O(carbon-yl) hydrogen bonds to form a dimer with an R(2) (2)(14) graph-set motif. A C-H⋯O(hy-droxy) inter-action links pairs of mol-ecules into another type of cyclic dimer with an R(2) (2)(18) motif. The mol-ecules are further linked by C-H⋯N inter-actions to form layers parallel to (001). Offset π-π stacking [3.3877 (8) Å] is observed in the crystal structure, with an inter-planar spacing between the planes of neighboring benzene rings of 3.444 (1) Å.