Explore the wonderful world of knots! Knot Explorer is a fun and engaging app for visualizing and manipulating topological knots. A topological knot is a closed loop in space that is entangled or knotted and cannot be unentangled without cutting. Knot Explorer includes all knots up to 8 crossings, with hand-crafted projections and elegant 3D embeddings. These knots can be viewed in 3D, rotated in space, and they can be manipulated and deformed. Knot Explorer can also make all (P,Q)-torus knots. A (P,Q)-torus knot is a knot that can be drawn on the surface of a torus.