Begin by cutting boneless, skinless chicken breasts into bite-sized pieces, about 1-2 inches each. Place the chicken in a large bowl, drizzling with olive oil. Toss well to ensure every piece is coated.

In a separate bowl, combine breadcrumbs (or panko), grated Parmesan cheese, ranch seasoning mix, salt, and pepper. Stir the mixture thoroughly with a fork until everything is evenly blended.

Toss the oiled chicken pieces in the breadcrumb mixture until thoroughly coated. Set the coated chicken aside while you prepare the air fryer.

Preheat your air fryer to 400°F for 3-5 minutes. Spray the air fryer basket with cooking spray to prevent sticking.

Carefully place the coated chicken bites in a single layer in the air fryer basket. Cook for 10-12 minutes, shaking the basket halfway through.

Check for doneness, ensuring the chicken has an internal temperature of 165°F. Allow them to rest for 2-3 minutes before serving.