Start by patting the cod fillets dry with paper towels to remove excess moisture, which helps achieve a better crisp.
In a small bowl, mix together olive oil, lemon zest, dried herbs, salt, and pepper to create a marinade and seasoning blend.
Brush or rub the seasoning mixture generously over both sides of the cod fillets, ensuring an even coating.
Preheat your air fryer to 200°C (392°F) for about 3 minutes if your model recommends preheating.
Place the seasoned fillets in the air fryer basket, skin-side down if applicable, making sure they aren’t touching to allow proper air circulation.
Cook the cod for around 10-12 minutes, or until the exterior is golden and crispy, and the flesh easily flakes with a fork.
Use tongs to carefully remove the cod fillets from the air fryer and transfer them onto a plate.
Let the fish rest for a minute, then serve immediately, garnished with extra lemon wedges or herbs if desired.