CHD (Compressed Hard Disk) is a file format used to store and compress data, often used for ROMs (Read-Only Memory) of classic video games. CHD ROMs are essentially archives that contain the game data in a compressed form.
The "full story" of is a community-led movement to optimize PlayStation 2 game libraries for modern emulators using the CHD (Compressed Hunks of Data) format . While the format originated for MAME, it has become the gold standard for PS2 emulation because it offers lossless compression that significantly reduces file sizes without sacrificing data integrity. Why "Verified" Matters ps2 chd roms verified
This is part of the MAME tools distribution. CHD (Compressed Hard Disk) is a file format