gb / gbc header editor — free browser tool | fatcousin

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edit game boy and game boy color rom header fields · title · cart type · region · auto-recompute checksums · download · runs locally

drop rom

drop a game boy rom

.gb / .gbc — original Game Boy or Game Boy Color

Select file

status

drop a game boy rom to edit its header

notice

you supply your own files. fatcousin does not host, link to, or recommend sources for rom files, bios files, or copyrighted game data. this tool is for preservation, modding, research, and education with files you lawfully possess. all processing runs in your browser — files never leave your device.