To start, preheat your air fryer to 400⁰F (200⁰C). Make sure it is on the "air fry" setting and not anything else. This will affect the frying time.
Once preheated, place the frozen french fries inside your air frying basket. Make sure to not overload the basket. There should be about 2 layers of fries, not densely packed.
Next, spray some cooking oil on the fries BEFORE you start frying them. This just helps make them extra crispy and beautifully golden brown. You can season the fries now if you want, but I prefer doing so afterward.
Close the air fryer. Leave the fries to cook for roughly 8-10 minutes. At the halfway mark, give the fries a good shake in the basket. This helps distribute the heat and allows the fries to cook better.
Once the fries are finished cooking, toss them in your favorite seasoning and serve them while they are still warm.