An air fryer is a kitchen appliance that cooks food by circulating hot air around it, creating a crispy outer layer similar to frying but with significantly less oil. This method allows for healthier cooking, as it can reduce fat content while still delivering a satisfying texture. Air fryers are versatile and can be used to prepare a variety of foods, including fries, chicken wings, and even vegetables. Many models come with preset cooking functions, making it easy for users to achieve optimal results without extensive cooking knowledge.