.wav or .mp3 files: The audio assets used for your project's sounds. Method 1: The File Extension Rename (Fastest Method)
To convert a file to an SB3 (Scratch 3.0 project) file, you typically only need to change the file extension, as an SB3 is essentially a ZIP archive containing specific project data. Conversion Methods Manual Extension Change (Recommended) :
to end with .sb3 (like myproject.sb3 ).
This comprehensive guide will walk you through exactly how to convert a ZIP file to SB3, why this file structure exists, and how to troubleshoot common errors when loading your projects. What is an SB3 File?
An .sb3 file is a package used by Scratch 3.0 to store all elements of a project in one place. If you rename an .sb3 back to .zip and open it, you will find: convert zip to sb3
Don't look for a converter. It is the official, fastest, and safest way to handle this file type.
project.json : A text file containing all the blocks, variables, and logic of your code. This comprehensive guide will walk you through exactly
# Check if it's a valid SB3 candidate with zipfile.ZipFile(zip_path, 'r') as z: if 'project.json' in z.namelist(): shutil.copy(zip_path, output_path) print(f"Converted: zip_path -> output_path") else: print(f"Invalid SB3 structure: zip_path")
Check that the file named project.json is spelled correctly and sits in the root directory of your zip archive. Without this file, Scratch cannot interpret the project. The File Stays a ZIP File After Renaming If you rename an
.wav or .mp3 files: The audio assets used for your project's sounds. Method 1: The File Extension Rename (Fastest Method)
To convert a file to an SB3 (Scratch 3.0 project) file, you typically only need to change the file extension, as an SB3 is essentially a ZIP archive containing specific project data. Conversion Methods Manual Extension Change (Recommended) :
to end with .sb3 (like myproject.sb3 ).
This comprehensive guide will walk you through exactly how to convert a ZIP file to SB3, why this file structure exists, and how to troubleshoot common errors when loading your projects. What is an SB3 File?
An .sb3 file is a package used by Scratch 3.0 to store all elements of a project in one place. If you rename an .sb3 back to .zip and open it, you will find:
Don't look for a converter. It is the official, fastest, and safest way to handle this file type.
project.json : A text file containing all the blocks, variables, and logic of your code.
# Check if it's a valid SB3 candidate with zipfile.ZipFile(zip_path, 'r') as z: if 'project.json' in z.namelist(): shutil.copy(zip_path, output_path) print(f"Converted: zip_path -> output_path") else: print(f"Invalid SB3 structure: zip_path")
Check that the file named project.json is spelled correctly and sits in the root directory of your zip archive. Without this file, Scratch cannot interpret the project. The File Stays a ZIP File After Renaming