Right-click your ZIP file and choose "Extract All."
How to Convert ZIP to SB3 (and Fix Common Errors) If you’ve ever tried to upload a Scratch project only to realize you have a .zip file instead of a .sb3 file, you’re not alone. Scratch 3.0 projects are essentially compressed archives, but the editor won't recognize them unless they have the correct extension and internal structure. convert zip to sb3 fix
Your computer might warn you that changing extensions can make files unusable. Click Yes or Use .sb3 . Right-click your ZIP file and choose "Extract All