In the title compound, C13H9FO3, the dihedral angle between the two benzene rings is 59.86 (4)°. In the crystal, inter­molecular O—H⋯H hydrogen bonds lead to molecular chains propagating in [010].

In the title sulfonamide derivative, C14H13F2NO4S, the dihedral angle between the benzene rings is 66.05 (9)°. The crystal structure is stabilized by weak inter­molecular N—H⋯O hydrogen bonds involving the amine and meth­oxy groups, which link the mol­ecules into a one-dimensional chain. No significant inter­chain contacts are observed.