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Silver is an agent used for different wounds and ulcer treatment as it is nontoxic. However, silver in an ionic or Nanoparticles form is highly toxic to microorganisms. Hence, silver Nanoparticles has wide range of applications than silver ion. Over the physical and chemical methods green synthesis is eco-friendly and cost effective. The present study reveals the formation of silver Nanoparticles by using the fruit extract (Ananas Comosus) by observing the colour change. The produced nanoparticles are characterized by the physicochemical techniques, X-ray diffraction, UV-Visible and antimicrobial activity. The diffraction peaks attributed to 2θ values of 38.11˚ and 44.27˚ (111, 200) reveals the formation of silver nanoparticles. UV-Vis spectrophotometer shows Surface Plasmon resonance (SPR) at 459 nm. The antibacterial studies promise the formation of silver nanoparticle with the ability to inhibit growth of Escherichia coli.