You will run the conversion tool on those raw disc files to generate the final . Method 1: The Best Way (CHDMAN via CHD-MANager)
How to Convert ZIP to CHD: The Ultimate Guide to ROM Compression
chdman createcd -i image.iso -o output.chd Convert Zip To Chd
Retro emulation has evolved significantly over the years. Players no longer have to tolerate cluttered directories, slow loading times, or massive file sizes. If you emulate disc-based consoles like the PlayStation, Sega Saturn, Dreamcast, or 3DO, you have likely encountered game files stored in ZIP, BIN/CUE, or ISO formats.
This method gives you the most control and is the same across Windows, macOS, and Linux. You'll need chdman and an extraction tool like unzip . You will run the conversion tool on those
Right-click your game's ZIP file and extract it using 7-Zip. You should see the uncompressed disc image files, usually ending in .bin and .cue , or .iso . Step 2: Get CHDMAN
For large collections, a dedicated script can save countless hours. If you emulate disc-based consoles like the PlayStation,
Converting your disc-based game ROMs from ZIP to CHD is not merely a trend; it is a significant upgrade for any retro gaming library. You gain superior compression, better emulator performance, a cleaner library, and the peace of mind that comes with a fully reversible, lossless process.
If you are into retro gaming and emulation, your hard drive is likely crying for help. ROM sets for systems like the Sega Saturn, PlayStation, and arcade machines (MAME) are massive. Converting your ZIP files to CHD (Compressed Hunks of Data) is the gold standard for saving space without losing quality. Why Convert to CHD?
Hit the "Go" button. The tool will automatically run the compression and output your new CHD files. Method 2: Using chdman (The Pro Way)