Preheat your air fryer to 350 degrees F. If your air fryer doesn't have a preheat featured, move to the next step.
In a gallon size zip top bag, pour the pretzels in. Pour in the butter. Seal bag and shake vigorously to coat the pretzels in butter.
Open bag and carefully pour in the garlic and onion powder, seal and shake again until evenly distributed. If you want more flavor, add more seasoning now if you want.
Once done, layer in the bottom of your air fryer and air fry in batches at 350 degrees F for 3-5 minutes. Watch carefully since all air fryers are different.
Allow to cool completely. Store in an airtight container for up to one week.