Preheat your refrigerator to chill the dessert.
In a mixing bowl, combine crushed graham crackers and melted butter. Stir until well combined.
Press the graham cracker mixture into the bottom of a 9x13 inch baking dish to form the crust.
In a separate bowl, beat the softened cream cheese with an electric mixer until smooth.
Gradually add the powdered sugar to the cream cheese, mixing until fully combined.
Gently fold in the thawed whipped topping, drained crushed pineapple, and vanilla extract until well incorporated.
Spread the pineapple mixture evenly over the crust in the baking dish.
Cover and refrigerate for at least 2 hours or until set. For best results, refrigerate overnight.
Once set, sprinkle chopped pecans on top (if using) before serving.