A pallet jack, also known as a pallet truck, pallet pump, pump truck, scooter, dog, or jigger, is a tool used to lift and move pallets. It is the most basic form of a forklift and is intended to move pallets within a warehouse or trailer. Pallet jacks come in two types: manual and powered. Manual pallet jacks are hand-powered and are most commonly seen in retail and personal warehousing operations. They are used predominantly for lifting, lowering, and steering pallets from one place to another. Powered pallet jacks, also known as electric pallet trucks, walkies, or power jacks, are motorized to allow lifting and moving of heavier and stacked pallets. They are generally moved by a throttle on the handle to move forward or in reverse and steered by swinging the handle in the intended direction.

Pallet jacks are essential tools found in warehouses and are used for transporting small loads for short distances. They are used for loading and unloading of trucks while riding electric pallet jacks can be used for horizontal transport through warehouses. Pallet jacks are classed as material-handling equipment (MHE), and under most health and safety law, training is required in their use (particularly for powered pallet jacks) .

Manual pallet jacks have existed since at least 1918. Early types lifted the forks and load only by mechanical linkages. More modern types use a hand-pumped hydraulic jack to lift. Pallet jacks offer a quick, convenient method of transporting skids and pallets around your work area. They are used to carry wooden pallets of material across warehouses without putting any strain on the person lifting them up or down.