Sometimes Windows or macOS hides file extensions. You might think you renamed your file to project.sb3 , but it’s actually named project.sb3.zip .
Delete .zip at the end of the filename and type .sb3 .
Right-click the highlighted files and select Compress to ZIP file (Windows 11) or Send to > Compressed (zipped) folder (Windows 10). convert zip to sb3 fix
Right-click your ZIP file and choose "Extract All."
Here is a comprehensive guide on how to convert ZIP to SB3 and how to fix the most common errors that occur during the process. What is the Difference Between ZIP and SB3? Sometimes Windows or macOS hides file extensions
If Method 1 fails with an "Application Error" or "Could not load project," the internal folder structure is likely wrong. Scratch expects the project.json file to be in the , not tucked inside a folder.
Change the resulting Archive.zip to ProjectName.sb3 . Common "Convert ZIP to SB3" Fixes Right-click the highlighted files and select Compress to
Are you having trouble with a or a large file size while trying to upload your project?