Synthetic dyes are widely used in textile, paper, food, cosmetics and pharmaceutical industries as above the textile industry was the largest consumer. Azo dyes are the largest group among all other synthetic dyes used in textile industry. Textile dyeing and finishing processes generate a large amount of dye contaminating the main sources of water; it’s the big bang pollution problems worldwide. Nanoparticles can be synthesized by using green synthesis methodologies with microbes and plant extracts. Under the favorable conditions, size and surface of nanoparticles can be easily altered to achieve Eco friendly degradation of azo dyes. Nanotechnology is recognized as the study of particle with a minimum of one dimension in nanometers. This work is based and focused on the green synthesis of ZnO nanoparticles using the seed extract of Moringa oleifera L. Characterization of Zinc nanoparticles was done by UV-Visible spectrophotometer for its Surface Plasmon resonance, SEM for morphologies, XRD and FTIR for its structure and DLS for determination of the size. The synthesized nanoparticles was evaluated for its efficiency in reducing the azo dyes.