If you prefer an automated approach or are having trouble with manual renaming:
The .sb3 file format was introduced with Scratch 3.0. Unlike earlier versions, it is a that bundles everything your project needs into one file. Inside a standard SB3 file, you will find: project.json : The core code and metadata for your project. convert zip to sb3
Save as convert.py and run in the folder with your ZIPs. If you prefer an automated approach or are
: If you don't see ".zip" at the end of your file name, you may need to enable "File name extensions" in your operating system's view settings. the review is simple:
If you renamed your Zip to SB3 and Scratch gives you an error, the review is simple: