Fidelionix redefines quantum optics analysis by offering an elegant and accurate way to measure how closely an experimental quantum state matches its ideal target. Built with precision and simplicity, it combines advanced matrix computation with a clean, gradient-driven interface, allowing users to calculate quantum state fidelity and purity in seconds. With smart features like noise and detector efficiency correction, instant sharing, and intuitive input guidance, Fidelionix transforms complex quantum tomography into an effortless, lab-ready experience empowering researchers to validate, compare, and perfect their optical quantum systems with confidence.