Highlight everything inside that folder (Ctrl+A or Cmd+A). Do not select the parent folder itself.
A user downloads a Scratch project from an online backup but it’s saved as game.zip instead of game.sb3 . Dragging it into Scratch fails. Your tool fixes the internal structure and outputs a working game.sb3 . convert zip to sb3 fix
Extract the ZIP completely. Right-click > Extract All . Step 2: Open the extracted folder. Look for a file named project.json . Highlight everything inside that folder (Ctrl+A or Cmd+A)
Add a robust, user-friendly feature that reliably converts legacy Scratch project ZIP exports (or malformed/partial ZIPs) into valid .sb3 files so projects open in modern Scratch. convert zip to sb3 fix