A novel protocol has been reported for synthesis of pyrazoles by visible light irradiation in the presence of eosin Y, an organophotocatalyst under atmospheric oxygen. We have successfully carried out a visible light induced Michael addition followed by intramolecular cyclization reactions for the formation of heterocyclic ring. The present method incorporates advantages such as being eco-friendly, involving metal free condition, reporting excellent yields, using minimum reaction time, making use of an easily available catalyst, and eliminating the use of column chromatography. (C) 2015 Elsevier Ltd. All rights reserved.