An .sb3 file is actually a renamed .zip file. If you change the file extension of any .sb3 file to .zip , you can extract it using standard compression software like WinRAR, 7-Zip, or Finder. What is Inside an SB3/ZIP File?
to extract the original project data and assets from a packaged file. Common Issues Zip and unzip files - Microsoft Support
If you attempt to load your newly minted .sb3 file into the Scratch offline editor or the website and receive a "Could not load project" or "Project corrupted" error, check for these three common culprits: 1. Broken JSON Syntax
Select Compress to ZIP file (or Send to > Compressed (zipped) folder on older Windows versions). Mac: Select Compress [Number] Items . A new .zip archive will be generated in that directory.
Click and download the processed file back to your computer. convert zip to sb3
A warning prompt will appear saying, "If you change a file name extension, the file might become unusable." Click . Open Finder and locate your ZIP file.
Change the file extension from .zip to .sb3 using the steps outlined in Method 1. On Windows (Using 7-Zip or WinRAR): Enter your asset folder and select all files ( Ctrl + A ).
If your converted file fails immediately, rename it back to .zip , open it, and verify that project.json is visible immediately upon opening the archive. If you see a folder first, uncompress it and re-zip using the exact method outlined in the section above.
: Automating version control by extracting the JSON for readable text commits. Pro Tips for Success to extract the original project data and assets
If you're comfortable with manual file manipulation, you can convert a ZIP file to SB3 by extracting the contents of the ZIP file and then loading them into Scratch. Here's how:
If you're comfortable with using command-line tools, you can use tools like unzip and scratch to convert ZIP to SB3.
Converting ZIP to SB3 is a straightforward process that can be done using a variety of methods. Whether you use Scratch, online conversion tools, command-line tools, or Python scripts, you can easily convert ZIP files to SB3 files.
Note: Do not zip the folder itself; zip the files inside the folder. Mac: Select Compress [Number] Items
If your ZIP file already contains the correct Scratch project structure (with the project.json at the top level), you can "convert" it simply by changing the extension.
: This usually happens if you zipped a folder containing your assets rather than selecting the assets themselves and zipping them. The project.json must be at the very top level of the ZIP structure.
Ensure file extensions are visible. (In File Explorer, click at the top, then check the box for File name extensions ). Right-click the .zip file and select Rename . Change the .zip text at the end of the filename to .sb3 .