📜 How It Works
- Select your Legacy Switch save files (
meta_0,slot_0) - The tool removes the Nintendo header and decompresses the data
- Downloads the converted
.jsonfiles ready for PC
slot_0, meta_0 → .json
slot_0MP files cause bugs on PC
🔄 Convert Your Saves
Drag & drop your Switch save files here
Legacy JSON files recommended
Selected Files
Processing...
✅ Conversion Complete!
❓ Need Help?
Where do I find my Switch save files?
If using a Switch emulator (like Yuzu or Ryujinx), saves are typically located in the emulator's user data folder under the game's title ID. For actual Switch hardware, you'll need homebrew tools (JKSV, Checkpoint)to extract saves.
Where do I put the converted files on PC?
On Windows, PC saves are usually located at:
%USERPROFILE%\AppData\LocalLow\Massive Monster\Cult Of The Lamb\saves\
Why didn't my MP save work?
MP (MessagePack) saves are not officially supported. While the converter can physically process them, the PC version of the game often fails to read the converted data correctly, resulting in frozen time or broken followers.
Do achievements transfer?
No — achievements do not transfer from Switch to Steam. I recommend using a tool like Steam Achievement Manager to manually unlock achievements on PC after converting your saves.