Rinse kale under cool water. Place kale on a stack of paper towels to dry and pat off any excess liquid. Chop the kale leaves into bite-sized pieces. Toss with salt and oil.
Place the seasoned kale in an air fryer basket.
Air fry the kale chips at 375°F for about 4 minutes, tossing them midway through air frying. Since kale is quite delicate, pay special attention that you don't burn the leaves in the last couple minutes of air frying.
Sprinkle with any additional seasoning to taste. Serve right away!