Wash and dry kale leaves. Spread each leaf on a cutting board. Cut the leaves from the spine. Discard the spine and roughly tear the leaves into small pieces.
Transfer kale to a bowl. Toss with olive oil and salt making sure each leaf is coated with a thin layer of oil. Transfer them to air fryer basket.
Air fry them at 350°F for about 6 minutes. Shake the basket at 4 minutes. Keep a close eye after 4 minutes.