Start by warming your air fryer to 375°F (190°C) and let it preheat for about five minutes.
Rinse and snip the ends off the green beans, then dry them thoroughly with a paper towel.
In a sizable bowl, mix the green beans with olive oil, garlic powder, sea salt, and black pepper until every bean is coated.
Arrange the green beans evenly in the air fryer basket to avoid overcrowding.
Cook the green beans for 8 to 10 minutes, giving the basket a good shake about halfway through to ensure even cooking.
Test the green beans for your preferred level of crispness, adding an extra minute in the air fryer if needed.
Dish up the green beans right away for a delicious and healthy side or snack.