Preheat your air fryer to 400°F (200°C). While it warms, season the salmon fillets generously with salt and pepper, ensuring the skin is dry to promote crispiness.
Place the seasoned salmon fillets skin-side down in the air fryer basket, making sure they aren’t touching to allow even air circulation.
Cook the salmon for about 10-12 minutes, until the skin is crispy and golden, and the flesh feels firm but still tender when pressed lightly.
Meanwhile, melt the butter in a small saucepan over low heat. Add the minced garlic and cook for about 1 minute until fragrant, stirring constantly.
Stir in the lemon zest and juice, then simmer for another minute to combine the flavors. If using white wine or broth, add a splash now and let it reduce slightly.
Once the salmon is done, transfer it to a serving plate and spoon the warm lemon butter sauce generously over the top.
Finish by sprinkling chopped fresh herbs over the fillets for a burst of color and freshness.
Serve immediately, enjoying the crispy skin, tender flesh, and bright, buttery sauce with your favorite sides.