Indazoles is an important class of heterocyclic compounds and synthetic intermediates having a wide range of biological and pharmaceutical activities,as anti-inflammatory,anti-tumor,anti-oxidant,anti-viral,anti-bacterial.There is enormous potential in the synthesis of indazoles to be used as building blocks for the next generation of pharmaceuticals,as well as herbicides and dyes.Various synthetic routes have been reported for indazoles,especially 1H-indazoles.The present review focuses on typical routes of their synthesis from diverse materials.