If the project loads with all your sprites, code blocks, and sounds intact, your conversion was completely successful. Troubleshooting Common Errors Error: "Could not load project" or Assets are Missing
To convert the extracted files to an SB3 file, you can use the scratch command:
If you're comfortable with using command-line tools, you can use tools like unzip and scratch to convert ZIP to SB3. convert zip to sb3
If you prefer an automated approach or are having trouble with manual renaming:
: Right-click the file and select Rename . Change .zip to .sb3 . (If you don't see the extension, enable "File name extensions" in the View tab of File Explorer). If the project loads with all your sprites,
Assets are named correctly (e.g., [hash].svg or [hash].wav ). No subfolders exist inside the archive.
Then open or rename as needed (the .zip produced is already correct; give it .sb3 extension if desired). Change
To change project metadata or complex logic not easily handled in the block editor.