Zip To Sb3 Extra Quality ((hot)) Page

| Mistake | Quality Impact | Fix | |---------|----------------|-----| | Using built-in macOS “Compress” function | Adds __MACOSX and .DS_Store files → project fails to load | Use Keka or Terminal zip -X | | Renaming .rar or .7z to .zip | Corrupts entire structure | Convert only real ZIP files, not other archives | | Keeping backup files inside (e.g., script.js~ ) | Causes JSON parsing errors | Delete all hidden files before zipping | | Zipping the parent folder | Creates ProjectFolder/project.json → Scratch sees no root JSON | cd into the folder, then zip contents | | Using online converters | Uploads your assets to unknown servers + often re-samples images to 72dpi | Use offline tools only |

If you are a dedicated , educator, or asset creator, you know the frustration. You download a project bundle as a .zip file—containing sounds, sprites, and code—only to find that when you convert it to the standard .sb3 format, something breaks. The music clips distort. The vector graphics lose their sharpness. Custom extensions fail to load. zip to sb3 extra quality

Have a quality tip we missed? Contribute to this guide on GitHub. | Mistake | Quality Impact | Fix |