The asymmetric unit of the title compound, C(13)H(13)NO(3)S, contains two crystallographically independent mol-ecules in which the dihedral angles between the phenyl and benzene rings are 88.16 (12) and 44.50 (12)°. One of the mol-ecules features an intra-molecular N-H⋯O hydrogen bond. In the crystal, the mol-ecules are linked into dimers by pairs of N-H⋯O hydrogen bonds. The dimers are further connected by C-H⋯O and C-H⋯π inter-actions, forming a three-dimensional network.