Prep the air fryer: Preheat your air fryer to 400°F (200°C) for 3–5 minutes. Lightly coat the basket with nonstick spray or brush with oil to prevent sticking.
Pat the fish dry: Use paper towels to dry the tilapia on both sides. This helps the seasoning stick and encourages a lightly crisp surface.
Season generously: In a small bowl, mix salt, black pepper, garlic powder, onion powder, and paprika. Drizzle the tilapia with olive oil. Sprinkle the spice mix evenly over both sides. Add the lemon zest on top and press it gently into the fish.
Arrange in the basket: Place the fillets in a single layer in the air fryer basket. Avoid overlapping. If needed, cook in batches so the air can circulate properly.
Air fry: Cook for 7–10 minutes, depending on thickness. Tilapia is done when it flakes easily with a fork and reaches an internal temperature of 145°F (63°C). Thinner fillets may be ready in as little as 6–7 minutes.
Add lemon: Immediately squeeze fresh lemon juice over the hot fish. This brightens the flavors and balances the seasoning.
Garnish and serve: Sprinkle with chopped parsley if you like. Serve right away with extra lemon wedges.