Preheat your oven to 250°F (120°C) and line a baking sheet with parchment paper.
In a large bowl, whisk together the oil, ranch dressing mix, red pepper flakes, garlic powder, onion powder, cayenne, black pepper, paprika, and parsley.
Add the crackers to the bowl and gently toss until evenly coated.
Spread the crackers in a single layer on the prepared baking sheet.
Bake for 15-20 minutes, stirring every 5 minutes to ensure even coating.
Let the crackers cool completely before serving. Store in an airtight container.