Gather all your ingredients for a smoother preparation process.

In a mixing bowl, add the crab meat, finely chopped celery, red onion, and your choice of dill or parsley. Gently mix to combine.

In a separate bowl, whisk together the mayonnaise, Dijon mustard, lemon juice, salt, and pepper until smooth.

Carefully fold the dressing into the crab mixture, ensuring everything is well-coated without breaking the crab meat too much.

Taste and adjust the seasoning as necessary. Cover and chill in the refrigerator for at least 30 minutes before serving.