Yes, you can put your air fryer on top of your refrigerator if the surface is stable and flat. Also, remember that you open the fridge several times and often open its door with a jerk. The air fryer might fall and break down if the surface is not flat and stable. Therefore, we don't recommend putting an air fryer on top of the fridge. The best place to put an air fryer is on your kitchen counter or kitchen cabinet.