Waterjet cutters use a stream of highly pressurized water to cut. They are used for metals, stone and glass, but also in the food industry, for pizzas, cakes, vegetables, frozen food, meat and candy bars.

Waterjet can be used for softwood, hardwood and plywood. Because the edges do not necessarily get wet from the cut, it can also be used for MDF and particle board, although for these materials laser cutting is probably more suitable. The cut is very thin, <1 mm, and any elaborate 2D shape can be cut.

Depending on the hardness of the material, the stream can be just water or water mixed with an abrasive material, normally garnet (which is the mineral used also in sandpaper).

Waste from waterjet cutting is water mixed with cut material and eventually abrasive. Depending on the type of material, wastewater can be discharged or must be treated. Waste abrasive is usually landfilled, although the technology for recycling it on the spot exists.