If you aren't comfortable with command prompts, several community-made tools provide a "point-and-click" interface for chdman:
Before converting, it’s crucial to understand why CHD is superior for disc-based media.
chdman This is part of the MAME toolset. You do not need the whole MAME emulator; you just need the chdman.exe file (Windows) or the binary (Linux/Mac). Convert Zip To Chd
Copy chdman.exe and paste it into the specific directory where your zipped game ROMs are stored. Step 2: Extract Your ZIP Files
However, manual entry is tedious if you have hundreds of games. Method 2: The "Batch" Method (Recommended) If you aren't comfortable with command prompts, several
Follow these steps to safely convert your zipped games into space-saving CHD files. Step 1: Download and Extract CHDMAN
Converting your retro game library from ZIP to CHD is the best way to optimize your gaming setup. You will reclaim massive amounts of storage space on your hard drive, clean up messy folders filled with loose BIN files, and enjoy seamless, direct-play compatibility with modern emulators. If you want to customize this process, tell me: Copy chdman
CHD files are treated as regular disc images. Use Load Content → select the .chd file directly.
To convert these files, you’ll need a utility called . This tool is included by default with any MAME installation. Method 1: Using the Command Line (Manual)
Have a massive MAME ROM set? That’s a different beast—MAME ROM ZIPs contain many small files (ROM chips) and should generally stay as ZIPs. CHD is for disc- and hard-drive-based games only.
Download the latest version of from the official website.