Dolphin will create a highly compressed version of your game and safely delete the bulky original ISO if you choose. Performance and Compatibility Impact
The need to manage large game collections doesn't have to be a problem. By adopting modern, highly compressed formats like , you can shrink your GameCube library to a fraction of its original size—often compressing games from 1.4GB down to a few hundred megabytes—with zero loss in quality or compatibility.
: RVZ files run perfectly with zero performance penalties. The emulator decompresses the necessary game assets on the fly. gamecube roms highly compressed
: Often used for legacy hardware loaders (like those on an original modded Wii). It is less efficient than RVZ but compatible with older tools.
If you have raw ISO files and want to compress them, has built-in tools. Open Dolphin Emulator . Go to File -> Converter . Choose your input file ( .iso or .gcm ). Select RVZ as the output format. Click Convert . Dolphin will create a highly compressed version of
dolphin-tool convert -i "game.iso" -o "game.rvz" -f rvz -c zstd -l 5 -b 131072
Original GameCube ISOs often contain padding data to fill up the 1.4GB disc capacity. Scrubbing removes this, often reducing a 1.4GB file to just a few hundred megabytes, depending on the game. : RVZ files run perfectly with zero performance penalties
What you are using for emulation (PC, Android, Steam Deck, or a modded console)? What emulator software you prefer?
Adjust the compression level (Zstandard is recommended for the best balance of speed and size). batch-convert a large library of games into the RVZ format?