Place the green beans in a mixing bowl and drizzle with olive oil. Toss until all beans are evenly coated and look glossy.
Sprinkle salt, black pepper, and garlic powder over the green beans. Toss again to distribute the seasonings evenly.
Preheat your air fryer to 400°F (200°C) for a few minutes, then place the seasoned green beans in the air fryer basket in a single layer.
Cook the green beans for about 8-10 minutes, shaking the basket halfway through, until they turn crispy and slightly browned around the edges.
Remove the green beans from the air fryer and transfer to a serving dish. They should look crispy, vibrant, and inviting.
Enjoy these crispy, tender green beans as a perfect side or snack. They are best served immediately while still warm and crunchy.