For a fast, direct, and private conversion, using a browser-based tool like is the best approach. It operates entirely within your browser, ensuring your file data never leaves your device and is not uploaded to any external server.
A warning may appear about changing extensions; select to confirm. convert zip to sb3
How to Convert ZIP to SB3: A Complete Step-by-Step Guide If you are working with Scratch 3.0, you might occasionally find yourself with a .zip file that you need to open as a Scratch project. Conversely, you might have a .sb3 file that accidentally changed its extension to .zip . For a fast, direct, and private conversion, using
Hover over and select Compressed (zipped) folder . (On Windows 11, you can simply click Compress to ZIP file from the context menu). How to Convert ZIP to SB3: A Complete
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:
A warning prompt will appear stating: "If you change a file name extension, the file might become unusable." Click to confirm. Locate your .zip file in Finder.