Zip To Sb3 ((new)): Convert

The file extension is the standard format for Scratch 3.0 projects. Structurally, an .sb3 file is actually a renamed ZIP archive containing the project’s assets (images and sounds) and a project.json file that defines the code.

• Requires downloading the offline editor (approx. 200MB).

1. Locate your .zip file (e.g., MyGame.zip).
2. Enable File Extensions: Click the "View" tab at the top of File Explorer and check the box next to "File name extensions."
3. Right-click the ZIP file and select Rename (or press F2).
4. Delete .zip and type .sb3 (e.g., MyGame.sb3).
5. Press Enter. Click "Yes" when Windows warns you about changing the file extension.
6. Done! Double-click the file to open it in Scratch.

Preconditions (check before you begin)

Compress to ZIP

: Right-click and choose Compress or Send to > Compressed (zipped) folder . convert zip to sb3