Preheat the air fryer to 375°F to 400°F
Wash and trim the woody ends off the asparagus
Pat the asparagus dry
Toss with olive oil, salt, and pepper
Add garlic powder, lemon zest, or parmesan if desired
Place asparagus in a single layer in the air fryer basket
Air fry for 5 to 8 minutes, depending on thickness
Shake the basket or turn the asparagus halfway through
Check for tenderness and lightly browned tips
Serve immediately