Preheat the air fryer to 400 degrees F (200 degrees C).
Place bread cubes in a large mixing bowl. Whisk parsley, garlic powder, and seasoned salt into melted butter and pour over bread cubes. Toss bread cubes with a rubber spatula until evenly coated. Let sit for 2 minutes for butter to absorb.
Place bread in the basket of the air fryer and cook for 4 minutes. Toss with a spatula and cook for 2 minutes more. Transfer croutons to a paper towel-lined plate until ready to use.