Depending on whether you are the game's developer or a player modifying a third-party game, your approach to editing an ES3 save file will differ. Method 1: The Built-In Unity ES3 Editor (For Developers)
Modify the values, copy the raw JSON output, and paste it back into your .es3 file. Method 3: Third-Party Community Save Editors es3 save editor
Fix corrupted save files or overcome game-breaking bugs. Depending on whether you are the game's developer
Open your .es3 file using a text editor or web-based editor. Step 4: Locate and Modify Data copy the raw JSON output
Download a Unity decompilation tool like (for IL2CPP games) or DnSpy/AssetRipper (for Mono games).
: No installation required; works on any operating system.