In this work, a single-atom cobalt-catalyzed transfer hydrogenation (TH) of azides is reported under mild conditions (at 30 ℃ in 30 min) using NH2NH2.H2O as the hydrogen source. Employing this protocol, a wide range of azides were transformed to their corresponding amines. This methodology was extended towards the synthesis of several important N-substituted pyrroles from azides in one-pot manner. The control experiments suggested, the transfer hydrogenation favoured by electron withdrawing substituents and one-pot pyrrole synthesis favoured by electron-donating substituents. The recyclability test revealed the catalysts could be recycled up to 7th times without significant loss in the catalytic activity.