Preheat your air fryer to 375°F (190°C) to ensure even cooking.
Cut the loaf of French bread into bite-sized cubes, about 1-inch in size.
In a mixing bowl, combine the olive oil, Italian seasonings, Parmesan cheese, and garlic salt. Stir until well blended.
Add the bread cubes to the bowl and toss gently until each piece is evenly coated.
Place the coated bread cubes in the air fryer basket in a single layer and cook for 8-10 minutes, shaking halfway through.
Remove from the air fryer once golden and crispy, and let them cool completely.