The mol-ecule of the title compound, C(6)H(8)N(6), is approximately planar, with a maximum deviation from planarity of 0.099 (1) Å. In the crystal, mol-ecules are linked to each other via pairs of N-H⋯N hydrogen bonding, forming inversion dimers. The crystal structure is further stabilized by π-π stacking inter-actions, with a centroid-centroid distance of 3.419 (1) Å.