Preheat the air fryer to 400 degrees or according to your manufacturer's directions for frozen foods.
Add the fries to the air fryer basket and spray lightly with cooking spray. Sprinkle it with salt.
Cook the fries for 5 minutes, then toss with spatula. Continue cooking until desired level of doneness is achieved. I've included a list of the common fries and their cook times in the notes.
Add additional salt if needed and serve with your favorite dipping sauce.
Notes
Regular Fries - 10 minutes
Waffle Fries - 10 minutes
Curly Fries - 10 minutes
Crinkle Fries - 13 minutes
Steak Fries - 13 minutes
Sweet Potato Fries - 15 minutes
Storage - Leftover cooked french fries can be stored in the fridge in an airtight container for up to 4 days. They will lose their crispiness in the fridge.
Reheating - I recommend reheating the fries in the air fryer again until warmed. Although they won’t get as crispy as they were when you first made them, they will still crisp up some.