afk.ai rigs the models Mixamo can't. Upload a GLB, glTF or FBX and an AI finds the legs, wings, tail and head, then fits a skeleton made for that kind of body: four-legged and hoofed animals, birds, dragons, dinosaurs, spiders, snakes, fish and people. Preview its animations on your model and download one GLB for Unity, Unreal, Godot or Blender. Free, and it runs in your browser on your own GPU.
