Convert Zip To Sb3

If you’ve been working with Scratch—the popular visual programming language from MIT—you’ve likely encountered two file types: .sb3 (the standard project file) and .zip (a compressed folder). But what happens when you download a project from a website, receive a file from a friend, or recover a backup, only to find a ZIP archive instead of an SB3 file? Is it possible to “convert” one to the other?

The short answer is yes—but not in the traditional sense of a video-to-audio conversion. Converting a ZIP to an SB3 is more about renaming and restructuring files correctly. convert zip to sb3

In this comprehensive guide, we’ll explain: If you’ve been working with Scratch —the popular

Snap! uses XML, not SB3. This guide applies only to Scratch 3.0-compatible environments. On macOS:

On macOS:

On Linux (command line):

Test by opening the .sb3 in Scratch (offline editor or upload to the Scratch website). If it fails, check project.json paths and asset names.

for file in os.listdir('.'): if file.endswith('.zip'): zip_to_sb3(file)

Save as convert.py and run in the folder with your ZIPs.

Even after converting, Scratch might refuse to load your file. Here’s why: