Knock

Choose an object that you can see within range. The object can be a door, a box, a chest, a set of manacles, a padlock, or another object that contains a mundane or magical means that prevents access. A target that is held shut by a mundane lock or that is stuck or barred becomes unlocked, unstuck, or unbarred. If the object has multiple locks, only one of them is unlocked. If you choose a target that is held shut with arcane lock, that spell is suppressed for 10 minutes, during which time the target can be opened and shut normally. When you cast the spell, a loud knock, audible from as far away as 300 feet, emanates from the target object.

The knock spell opens stuck, barred, locked, held, or wizard locked doors. It opens secret doors, as well as locked or trick-opening boxes or chests. It also loosens welds, shackles, or chains (provided they serve to hold shut something which can be opened). If used to open a wizard locked door, the spell does not remove the wizard lock but simply suspends its functioning for one turn. In all other cases, the door does not relock itself or become stuck again on its own. Knock will not raise a portcullis or operate any other similar mechanism, nor will it affect ropes, vines, and the like. Each spell can undo a single means of preventing access.