Mesekai is a real-time 3D virtual avatar and world web application. Users can select from a list of avatar and world presets for their digital persona and environment. Avatar limbs, fingers, and facial expressions are controlled by the user's physical body through webcam video. Pose estimation is performed using Google MediaPipe to track the user's body and face landkmarks. A forward kinematics solver uses the landmarks to calculate the joint rotations and facial blendshapes in order to animate the avatar. Full body tracking is supported, take a few steps away from your computer and try it out!