identify nes rom mapper from ines header · prg/chr sizes · mirroring · battery · nes 2.0 · runs locally
[drop rom]
drop an nes rom
.nes — iNES format (most NES ROMs from any dump set)
[status]
drop an nes rom (.nes) to identify its mapper
[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.