How to convert mbr to gpt without operating system

Create a Windows installation disk and it has a default tool for converting MBR to GPT without operating system. The installation disk is a storage medium used to install, reinstall, or repair a Windows operating system on a computer; common types are optical disks (CDs, DVDs) and bootable USB flash drives.

1. Create a Windows installation USB flash drive:
On another Windows computer, download Media Creation Tool from Microsoft website. Insert a USB flash drive of 8GB or more, run Media Creation Tool and select Create Installation Media.

2. Boot from the USB flash drive:
Insert the USB flash drive, reboot your computer into BIOS/UEFI (press F2/F12/DEL/ESC when booting up, it varies slightly from motherboard to motherboard) and set the USB flash drive as the first boot item, then save and reboot.

3. Enter the Windows installation interface and open the Command Prompt (CMD):
Press Shift + F10 to open the Command Prompt in the Windows installation screen.

4. Use the Diskpart utility to convert the disk format:
Type diskpart and press Enter.
Type list disk and press Enter to see all disks.

5. Locate the disk you want to convert (Disk 0) and type:

select disk 0
clean
convert gpt
exit

The clean command deletes the entire disk and convert mbr to gpt without os! Make sure you have a backup.

6. Exit and install Windows:
Close the command prompt and continue the Windows installation process. Select the GPT disk you just converted and install Windows 11 after MBR to GPT conversion.