The mol-ecule of the title compound, C(18)H(13)NO(3), is almost planar, the dihedral angle between the naphthalene and benzene ring systems being 4.04 (6)°. The mol-ecular conformation and packing are stabilized by intra-molecular O-H⋯N and inter-molecular O-H⋯O and C-H⋯O inter-actions.