Preheat the air fryer: Set it to 400°F (200°C) for 3–5 minutes so the basket is hot when the zucchini goes in.
Prep the zucchini: Wash, dry, and trim the ends. Cut into half-moons about 1/2 inch thick for a crisp-tender bite.
You can also cut into spears or chunks—just keep pieces similar in size.
Season: In a bowl, toss zucchini with oil, Parmesan, garlic powder, onion powder, paprika, Italian seasoning, salt, and pepper until well coated.
Load the basket: Arrange the zucchini in a single layer, with a little space between pieces. Work in batches if needed. Crowding leads to steaming instead of crisping.
Air fry: Cook at 400°F for 7–10 minutes, shaking the basket or turning the pieces halfway.
Start checking at 7 minutes. You want light browning on the edges and a tender center.
Finish and serve: Taste and add a pinch of salt if needed. Squeeze a little lemon on top and sprinkle with fresh herbs for brightness.
Serve hot.