Rufus is a specialized free tool for creating bootable USB devices. On a computer with an optical drive, you can simply burn an ISO image to a CD or DVD, but USB devices are easier to carry around and less prone to physical damages. It is also pretty common nowadays to find laptop dan desktop computers without optical drives. On such computers, Rufus is an immensely helpful tool for many. When it comes to creating a bootable USB, the popularity of this freeware is unrivaled.