Preheat the oven to 400°F. In a bowl, mix crushed pretzels, granulated sugar, and melted butter until combined. Press the mixture evenly into a 9×13-inch baking dish.
In a separate bowl, beat the cream cheese with sugar until smooth. Gently fold in the whipped topping until the mixture is creamy. Spread this filling evenly over the cooled pretzel crust.
Stir in the strawberry gelatin until completely dissolved, then let it cool to room temperature. Mix in the sliced fresh strawberries and gently pour the mixture over the cream cheese layer.