Because a project involves multiple files (code + images + sound), they cannot be stored as a single flat file easily. They need to be bundled together.
: Modifying the project.json to change variables or scripts that are difficult to edit in the Scratch UI. zip to sb3
If you’ve finished editing the files inside or you're building a project from scratch: Select all the files the folder (the project.json and all asset files). Important: Do not zip the folder itself; zip the files so they are at the top level of the archive. Compress them into a new Rename that new file from Archive.zip YourProjectName.sb3 You can now upload this directly back into the Scratch Editor by going to File > Load from your computer Why Would You Do This? Asset Extraction: Because a project involves multiple files (code +
Use the zip command in Terminal:
In this guide, we will demystify the Scratch project file format, explain exactly why and how to convert a ZIP file into an SB3 file, provide step-by-step instructions for Windows, Mac, and Chromebooks, and offer advanced troubleshooting tips for corrupted or misnamed files. If you’ve finished editing the files inside or