Preheat oven to 350°F (175°C) and line a 9x13-inch pan with parchment paper.
Mix melted butter, sugar, flour, and salt. Press into pan and prick with a fork.
Bake crust for 18–20 min until golden on the edges. Let cool slightly.
In a bowl, whisk brown sugar, corn syrup, eggs, melted butter, vanilla, and salt.
Stir in chopped pecans and pour over crust.
Bake for 30–35 min until set.
Cool completely, then chill 1 hour before slicing.