Shapeshift.io is the best crytocurrency converter ever. You can convert any digital coin to another. (for example:- litecoin to bitcoin, dogecoin to litecoin) no need to register. Just what you have to do is to transfer the coins to shapeshift.io and enter the address of coin type you need. Very simple and very fast. They will take a small amount as the fee but its negligible with the service they supply to us.