Pallet inverter for 180 degree rotation to change pallets before shipping. Fast and efficient to exchange damaged cartons at the bottom without unstacking the whole loads. Also available to work as a pallet retriever to remove the freezer spacer in cold chain industry and frozen food warehouses. The machine is available to be customized with clamps lowered to the floor level, convenient to load and unload by hand pallet truck with a ramp, perfect for places without a forklift. Safety fence with sensor built are used to prevent any personnels to get inside and stop the machine immediately.