chdman extractcd -i game.chd -o game.cue
Because CHD files store multi-track disc data (including game data and separate audio tracks), chdman will output a .cue sheet and one or more .bin files rather than a raw .iso . Step 4: Finalize into a Single ISO
: Before going through the effort of converting a file, it is a good idea to verify its integrity. Use the command chdman verify -i "input.chd" . If the verification fails, the CHD file may be corrupted, and the resulting ISO will likely be unusable.
If you have a CHD made from a scratched disc, converting it back to ISO allows you to use disc repair software to attempt sector recovery.
Locate the chdman.exe file inside the root directory. You only need this single file; you can copy it to any folder you like. Method 1: Converting a Single CHD to ISO convert chd to iso repack
Drag and drop your entire folder of CHD files directly into the program window. Select your output destination folder and click .
If you only have one or two games to convert for a quick repack, you can use a simple Windows Command Prompt sequence.
Now, open a command prompt in your working folder. The easiest way is to type cmd in the address bar of the folder and press Enter.
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This is a very common confusion. If you convert a CD-based CHD (for a PS1 or Saturn game) to an ISO using the wrong method, you might end up with a useless 1kb .iso and a large .bin file. This happens because many old CD games have multiple tracks. To fix this, ensure you use the extractcd command and a conversion script that specifically outputs a BIN/CUE pair, not a forced ISO.
If you are still having trouble, please check the Recalbox Wiki for more information.
This will check the ISO file for errors and display a success message if it's valid.
If your ultimate goal is to create a highly compressed PC or console repack, obtaining the ISO is only the first step. Uncompressed ISOs take up significant storage space, which increases download times and hosting costs. Next Steps for Repacking If the verification fails, the CHD file may
However, you may encounter scenarios—such as running older emulator versions, burning discs, or patching games—where you need a standard .iso or .bin/.cue file.
7z t output.iso
Simply create a new text file in your working folder (where chdman.exe is) and paste the following code inside. Then, save the file with the .bat extension (e.g., CHD_to_ISO.bat ):