. The specific command depends on whether the original disc was a CD or a DVD. Method 1: Command Line (Windows/Linux)
A lossless compression format created by the MAME team. It shrinks CD and DVD images significantly without losing any data.
Yes, the process works both ways, which is what users usually mean by "repack". Once you have modified or extracted your ISO, you can repack it back to CHD. For standard DVDs, the command is: convert chd to iso repack
While CHD is ideal for space-saving storage, it is not universally compatible. You generally need to revert to ISO for three main reasons:
Several graphical tools and scripts simplify bulk processing: It shrinks CD and DVD images significantly without
If you deal with retro gaming archives, you’ve likely seen the format. It is fantastic for saving space—often shrinking ISOs by 50% or more.
: Because CHD is lossless, the resulting ISO/Bin/Cue will be a bit-perfect match to the original uncompressed source. Batch Processing : If you have a large library, many users utilize simple scripts or third-party GUI wrappers (like ) to automate the conversion of multiple files at once. Storage Space For standard DVDs, the command is: While CHD
Click on the folder's address bar at the top of Windows File Explorer, type cmd , and press . This opens a Command Prompt window pre-routed to your folder. Type or paste the following command into the window: chdman extractcd -i "game_name.chd" -o "game_name.iso" Use code with caution. (Replace game_name with the exact filename of your game.)
Place your target .chd file into the same folder as chdman.exe .
chdman extracthd -i "game.chd" -o "game.iso"