Yes, you can leave a wood-burning stove on overnight, however, you must do so with caution. To begin, you will need to start your fire a few hours before nighttime. Pack uniform pieces of wood closely together and shut off your wood stove's air vents to ensure a slow and steady burn that will last overnight. Make sure that any exhaust is still being directed and flowing out of your chimney and that your room is well ventilated by slightly opening your windows to help prevent carbon monoxide poisoning. Then reduce your flames as much as possible before you go to sleep to reduce the risk of a fire breaking out.