Converting a ZIP file to an SB3 (Scratch 3.0 project) file is a common task for developers who need to manually edit assets or project code. Since an SB3 file is essentially a renamed ZIP archive, the process is straightforward and can be done manually or through online tools. 1. The Manual "Rename" Method
To convert a file to an (Scratch 3.0) file, you primarily need to rename the file extension, as SB3 files are essentially renamed ZIP archives containing a project's JSON code and assets. Conversion Process (Updated April 2026) convert zip to sb3 updated
Tips and Troubleshooting
while converting the ZIP back to SB3 and offers to rename the physical files inside the archive to match their in-editor sprite and costume names. Converting a ZIP file to an SB3 (Scratch 3
Confirm the change when the system warns you about changing file extensions. Step 3: Loading into Scratch Scratch Editor Navigate to Load from your computer Select your newly renamed Advanced: Using an Unpackager The Manual "Rename" Method To convert a file