In today’s digital-driven lifestyle, individuals across various sectors—including students, office employees, and remote workers—spend extended hours seated in front of screens. Prolonged sedentary behavior often results in poor postural habits, leading to musculoskeletal discomfort and decreased productivity. This research presents a real-time posture monitoring system utilizing MediaPipe BlazePose for keypoint detection. By analyzing the spatial relationships between body landmarks, the system identifies postures such as slouching, leaning, and improper arm or leg positioning. Immediate feedback is provided to encourage healthier sitting habits across diverse environments, from classrooms to offices and home workstations.