Preheat your oven to 375°F (190°C).
Rinse the crab legs under cold water and pat them dry with paper towels.
Place the crab legs in a large baking dish.
In a small saucepan, melt the butter over medium heat. Add the minced garlic and cook for about 1 minute until fragrant.
Stir in the lemon juice and Old Bay seasoning, then remove from heat.
Pour the butter sauce over the crab legs, ensuring they are well coated.
Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes.
Remove the foil and bake for an additional 5 minutes to let the crab legs crisp up slightly.
Sprinkle with salt, pepper, and fresh parsley before serving.