Line the bottom of your air fryer with aluminum foil.
Cover the bottom with ¼ cup of popcorn kernels.
Close the air fryer and turn it to 400°F. Cook for 10 minutes until the kernels start to pop. If you open it and some kernels are still closed, then take out the popped kernels and leave in the rest to cook for another 3 minutes.
Take out all of the popcorn and throw away any kernels that haven’t popped. Sprinkle with whatever seasonings you like and enjoy.