Disclosed is a tool for opening an inward-swinging door system having a door, a door latch, a door jamb, and a door stop. The tool includes a substantially rigid lock opening element having a proximal portion and a curved distal portion proportioned to fit between the door and the door jamb and between the latch and the door stop. The curved distal portion is configured to be used as a fulcrum to leverage the lock opening element against the door stop thereby causing actuation of the door latch.