Abstract: A package opening tool is useful for opening packages made of cellophane and other flexible plastic materials. The package opening tool comprises first and second plates pivotally connected at their respective back ends. The two plates are biased, as by a living hinge or a spring, to an open configuration whereat there is a V-shaped gap between the plates. The first plate has a cutter that faces the second plate. A package is inserted into the gap, and the tool is operated to a closed configuration by squeezing the front ends of the two plates together to cause the cutter to penetrate the package. A recess in the second plate receives the entire cutter when the tool is in the closed configuration. Then pulling the package from between the closed tool slices the package for easy further opening. The first plate preferably has a wall around the cutter to restrict access to the cutter. In some embodiments, positive stops limit the relative locations of the two plates in the open and closed configurations.