Preheat your oven to 350°F (175°C). Crush pretzels into medium-fine texture pieces.
Combine the crushed pretzels with melted butter and sugar, mixing until every pretzel bit is coated.
Press this mixture firmly and evenly into a 9×13-inch baking dish. A flat-bottomed measuring cup helps create a compact, even layer.
Bake the pretzel crust for 10 minutes. Allow it to cool completely to room temperature.
In a medium mixing bowl, beat the softened cream cheese and sugar until perfectly smooth and slightly fluffy—about 2-3 minutes on medium-high speed.
Gently fold in the whipped topping using a rubber spatula with a light hand to avoid deflating.
Spread the cream cheese mixture completely to the edges of your baking dish, creating a seamless seal against the sides to prevent jello from seeping down to the crust.
Dissolve the strawberry gelatin in boiling water, stirring for at least 2 minutes until completely clear. Allow this mixture to cool to room temperature.
Fold in the sliced strawberries once the jello has reached the perfect lukewarm stage.
Carefully pour the strawberry jello mixture over the cream cheese layer. Work slowly to avoid disturbing the cream cheese barrier below.
Refrigerate for at least 4 hours, though overnight chilling yields the most perfectly set and sliceable result.