Nanostructured SnS₂ with enhanced edge sites was prepared and investigated the impact on NO₂ gas molecules detection at room temperature (RT). SnS₂ flower-like structure with exposed active sites provides more interaction channels for the NO₂ gas molecules. The crystal orientation along with the (0 1 1) plane exhibits more active edge sites, thus enhancing the sensing performance of the flower-like structure. The fabricated SnS₂ gas sensor showed more selective towards NO₂ gas molecules. SnS₂ flower-like structure provides more stability of 81.22% and 32.63% increased sensing response compared to the platelet-like structure. This result provides a pathway for the development of a practical room temperature NO₂ gas sensor.