Since MV and MZ saves are essentially encoded JSON, you can edit them without a specialized "cheater" app. Always copy your save before touching it.
💡 If you're using RPG Maker VX Ace , look for the "RGSS3 Save Editor"—it’s the gold standard for older titles. If you’d like, I can help you: rpg maker save editor offline
This usually happens if you gave yourself an item ID that doesn't exist or set a stat higher than the game's engine can handle (e.g., trying to set HP to 1 billion). Since MV and MZ saves are essentially encoded
: Convert the edited text file back into the original format ( .rpgsave or .rmmzsave ) using the same tool. ⚠️ Important Precautions rpg maker save editor offline