Whether you’re using RetroArch , DuckStation , or PPSSPP , compressing your library to CHD can save up to 50% of your storage space without losing a single bit of game data.
To illustrate the practical reality, consider converting a PlayStation 1 disc (650 MB raw, mixed mode data+audio) on three Android devices: chdman android
The most user-friendly method is using a dedicated Android application that handles the conversion without complex commands. Whether you’re using RetroArch , DuckStation , or
pkg update && pkg upgrade -y pkg install libromfs mame-tools -y Use code with caution. Convert a 700MB PS1 image to a ~300MB file
Convert a 700MB PS1 image to a ~300MB file.
chdman on Android is a testament to the adaptability of open-source preservation tools. It is not a pleasant experience—thermal throttling, memory constraints, and filesystem quirks make it slower and more error-prone than on any desktop OS. Yet it works. And in doing so, it allows a billion Android users to convert, store, and play disk-based games entirely on their phones. The tool’s journey from MAME’s command line to a Termux shell running on a bus commute encapsulates the modern era of computing: powerful, messy, and relentlessly portable. As mobile chips improve (e.g., ARM’s Cortex-X cores with larger caches) and as chdman gains better ARM NEON optimizations, the gap will narrow. For now, chdman on Android remains a power user’s tool—one that delivers the profound satisfaction of compressing a lost CD image while holding a device that fits in your palm.