An air fryer is a kitchen appliance that cooks food by circulating hot air around it, creating a crispy outer layer similar to frying. It uses significantly less oil than traditional frying methods, making it a healthier option for preparing various dishes, including vegetables, meats, and snacks. Air fryers come in various sizes and designs, often featuring adjustable temperature settings and timers for convenience. They are popular for their ability to cook food quickly while retaining moisture, making them a versatile addition to many kitchens.