Preheat oven to 350°F.
Crush pretzels into fine crumbs. Mix with melted butter and sugar.
Press pretzel mixture into 9x13 inch baking dish.
Bake crust for 10 minutes. Cool completely.
Beat cream cheese and sugar until smooth.
Fold in Cool Whip until well combined.
Spread cream cheese mixture over cooled pretzel crust.
Refrigerate for 1 hour to set.
Dissolve strawberry gelatin in boiling water.
Add cold water and stir.
Arrange sliced strawberries over cream cheese layer.
Carefully pour gelatin over strawberries.
Refrigerate for 2 hours or until gelatin is fully set.