Preheat oven to 400°F and line a baking sheet with parchment paper.
In a medium bowl, combine crushed pretzels, chopped pecans, and brown sugar.
Stir in melted butter until the mixture is well combined.
Spread the pretzel mixture evenly on the prepared baking sheet.
Bake for 8 to 10 minutes until bubbling, then allow to cool completely.
Break the cooled pretzel mixture into small pieces for the topping.
In a large bowl, beat softened cream cheese, granulated sugar, and vanilla extract until smooth.
Fold in the Cool Whip until fully incorporated.
Cover the mixture and refrigerate until ready to serve.
Before serving, fold in the sliced strawberries and half of the pretzel crunch.
Top with the remaining pretzel crunch and serve immediately.