Rufus is a free and open-source portable application for Microsoft Windows that can be used to format and create bootable USB flash drives or Live USBs.
It can be especially useful for cases where:
1- you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.)
2- you need to work on a system that doesn't have an OS installed
3- you need to flash a BIOS or other firmware from DOS
4- you want to run a low-level utility