Convert Zip To Sb3 -
Error: “Unable to load project” or infinite loading.
Fix: Ensure project.json is at the archive’s root, not inside a subfolder. Unzip, rearrange, and re-zip using Method 2.
Windows (PowerShell):
ren "MyProject.zip" "MyProject.sb3"
macOS / Linux (Terminal):
mv MyProject.zip MyProject.sb3
Many Scratch projects are shared as .sb3 files (the official Scratch 3 project format), but sometimes you’ll receive a Scratch project packaged as a ZIP archive containing a project.json and associated assets (images, sounds, etc.). Converting that ZIP into a valid .sb3 file is straightforward because an .sb3 is simply a ZIP archive with a specific internal structure and a .sb3 file extension. Below is a concise, practical guide you can use as a draft article or how‑to. convert zip to sb3
Get-ChildItem -Filter *.zip | Rename-Item -NewName $_.Name -replace '\.zip$','.sb3'