If your ZIP file contains assets (images, sounds) and code files but isn't a "ready-to-go" project dump, you must construct the .sb3 manually to ensure .
Did you while the project was unzipped?
Your operating system will show a warning stating that changing the extension might make the file unstable. Click or Use .sb3 to confirm. 3. Test in Scratch zip to sb3 extra quality
: Standard ZIP compression is lossless, meaning the quality of the internal files (like your code or original images) will not degrade during the archiving process. If your ZIP file contains assets (images, sounds)
Confirm the change when your operating system warns you about changing file extensions. Method 2: Utilizing Scratch Project Packagers zip to sb3 extra quality