Start by preheating your air fryer to 400°F (200°C). This ensures an even cooking temperature, resulting in perfectly crispy fries.
If desired, lightly spray the basket of the air fryer with nonstick cooking spray. This step is optional, as many frozen French fries are pre-oiled.
Measure out 16 ounces of your chosen frozen French fries and place them in the air fryer basket. Spread them out in a single layer for even cooking.
Cook the fries at 400°F (200°C) for 10 to 15 minutes. Halfway through the cooking time, pause the air fryer and shake the basket or use tongs to flip the fries for even browning.
After the timer goes off, check the fries for your desired level of crispiness. If you prefer them crispier, add an extra 2 to 3 minutes of cooking time.
Once the fries are done, transfer them to a serving bowl. If desired, sprinkle with kosher salt or any other seasoning you love. Serve immediately with your favorite dipping sauce!