How do you turn brown egg to white egg?

Answer 1

you can only turn a brown egg white by immersing the egg in vinegar for about 40 minutes, then take it out and underwater or tap brush it lightly with a soft toothbrush and the brown will come off leaving you with a white egg.

Answer 2

you dont, unless you are God, and even then he will not interfer.

Color of egg is based on type of chicken or bird, some on their diet, and no reason to need it to change colors. Brown eggs or white eggs here in supermarkets, if good quality makes not much difference.