Sb3utility — Tutorial

| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | Cannot find asset: 5d5a5f.png | Missing costume file in assets folder | Restore the file or edit the asset reference in project.json | | JSONDecodeError: Expecting property name | Corrupted project.json | Use a JSON repair tool (like jsonlint ) or recover from a backup | | Permission denied | File is open in another program | Close Scratch, audio players, or image editors | | Invalid sb3: not a zip file | File is not a true .sb3 or is truncated | Try re-downloading or check if it’s actually an older .sb2 file (use sb2utility instead) |

Want to add a hidden sprite that gives infinite lives? Unpack the project, then: Sb3utility Tutorial

Some forks provide a graphical interface: | Error Message | Likely Cause | Solution

Output includes: