Heat oven to 400°F. Line a sheet pan with foil and place a wire rack on top.
Brush or rub the rack with olive oil to prevent sticking.
Mix cracker crumbs, Parmesan, garlic powder, onion powder, paprika, salt, pepper, and cayenne in a bowl.
Stir melted butter into the crumbs until evenly moistened.
Pat pork chops dry. Spread a thin layer of mayonnaise on both sides.
Press each chop into the crumb mixture, coating all sides well.
Arrange chops on the rack. Bake until golden and 145°F inside, about 20–22 minutes.
Broil 1 minute for extra crunch, if desired. Rest 5 minutes.
Sprinkle with parsley and serve warm.