The raw, uncompressed disc image of a Wii game. These files are exactly 4.37 GB (or 7.93 GB for dual-layer discs), regardless of how much actual data the game uses.
Choose your destination folder, and the tool will generate the .wbfs file for you.
Done. 4.3 GB → 3.1 GB. Ready to play.
The optimized file format for Wii homebrew. It strips out the useless "dummy data" or padding from a raw ISO, making the file size significantly smaller and ready for USB loaders.
Several methods exist, ranging from quick online tools to robust desktop software. 1. Wii Backup Manager (Windows - Recommended) 7z to wbfs converter
To help narrow down the conversion process, please share your computer runs and which Wii USB loader app you plan to use. Share public link
: You must first use the Dolphin Emulator to convert it back to an ISO before proceeding. Step 3: Convert ISO to WBFS
The software will now convert the file to the optimized WBFS format (if it was an ISO) and copy it directly to your USB drive under the perfect directory format: USB:/wbfs/GameName [GameID]/GameID.wbfs . Alternative Method: Using Command-Line Tools (Mac & Linux)
He dragged his first 7z file into the left panel. Mario Kart Wii.7z . 1.2 GB compressed. The raw, uncompressed disc image of a Wii game
USB Drive (D:) └── wbfs/ └── Game Title [TitleID]/ └── TitleID.wbfs Use code with caution. Real-World Example:
Extracts the hidden ISO or WBFS file out of the 7z archive. Cost: 100% Free and Open Source. 2. Wii Backup Manager (The Definitive Converter)
Your external storage device must be formatted to or NTFS (FAT32 is highly recommended for maximum homebrew compatibility). Structure your files exactly like this:
When using Wii Backup Manager, you can set it to split .wbfs files into 4GB parts. This is essential if you're using a FAT32 formatted USB drive, which is often recommended for compatibility with Wii homebrew apps. The optimized file format for Wii homebrew
USB Drive (D:) └── wbfs └── Mario Kart Wii [RMCE01] └── RMCE01.wbfs Use code with caution.
A compressed archive file created by the program 7-Zip. It holds the actual game data inside it to save storage space during transfer.
The Ultimate Guide to 7z to WBFS Conversion: Streamline Your Wii Gaming Backup Library
Wait for the progress bar to finish. Once extracted, look inside the folder. You will see one of two things: An .iso file (requires conversion).