Zenker's diverticulum is an esophageal diverticulum that occurs in the elderly and contributes to morbidity due to dysphagia and aspiration pneumonia. Open surgery and rigid endoscopy were previously the mainstay of treatment, however, with a favorable safety profile and similar success rates, flexible endoscopy has emerged as a new treatment modality for Zenker's diverticulum. This review aims to highlight endoscopic techniques and tools in the management of Zenker's diverticulum.