EaseUS
EaseUS Partition Master is able to convert MBR disk to GPT disk and vice versa without data loss to make full use of hard disk space. If there is any special environment and you need to use MBR disk, EaseUS Partition Master can also convert GPT disk to MBR disk easily.
EaseUS Software: https://www.easeus.com
Your Powerful & Easy to Use EaseUS Software!