Abstract—The Online Car Rental System presents a streamlined approach to modernize and simplify the vehicle rental process. In response to the increasing demand for flexible and accessible transportation, this system provides a user-friendly online platform connecting rental services with customers. This system allows users to effortlessly browse and select vehicles through an intuitive web interface or mobile application. Key features include efficient reservation and booking capabilities, enabling users to schedule pickups and returns at their convenience. The implementation of secure payment processing ensures a smooth and reliable transaction experience. For rental agencies, the system offers centralized management, simplifying reservation tracking, vehicle maintenance scheduling, and financial transactions. Real-time availability tracking optimizes fleet management, allowing agencies to meet customer demand effectively.