Preheat the air-fryer to 190°C/375°F.
Peel the sweet potatoes and slice them into fries.
Toss the sweet potato fries in the oil, salt, chilli and paprika, ensuring every fry is coated.
Tip into the preheated air-fryer in a single layer.
Air-fry for 15 minutes, turning once halfway during cooking.
Serve immediately.