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The title compound, C20H15N5O3, was synthesized by the one-pot reaction of a four-component reaction protocol in aqueous medium. The pyrano[2,3-c]pyrazole system is essentially planar, with a maximum deviation of 0.026 (2) Å. The 3-nitrophenyl and phenyl rings make dihedral angles of 81.11 (5) and 13.36 (1)°, respectively, with the mean plane of the pyrano[2,3-c]pyrazole ring. The crystal structure is stabilized by N—H...N hydrogen bonds, which form infinite chain propagating along the c axis and by N—H...O hydrogen bonds, which form infinite chains propagating along the a axis. There are also N—O...N—C dipole–dipole interactions along the a axis with an O...N distance of 3.061 (3) Å, which is shorter than that of the N—H...O hydrogen bond [3.196 (3) Å].