Converting (the file format used by Scratch 3.0 ) is a common task for developers looking to manually edit project files. Because an file is essentially a renamed archive containing a project.json
: ZIP archives support encryption and password protection, which can be used to secure data during transfer, though Scratch itself typically uses standard, unencrypted .sb3 files. Related Technical Terms zip to sb3 extra quality
If you’ve ever downloaded a Scratch project from a GitHub repository, a backup drive, or a collaborative asset pack, you’ve likely encountered the .zip format. While convenient for storage, ZIP files are useless for the Scratch 3.0 editor. To run or edit the project, you need the .sb3 file. Converting (the file format used by Scratch 3
if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python convert_to_sb3.py input.zip [output.sb3]") sys.exit(1) input_file = sys.argv[1] output_file = sys.argv[2] if len(sys.argv) > 2 else None zip_to_sb3_extra_quality(input_file, output_file) While convenient for storage, ZIP files are useless
The project.json is the most fragile component.