The .sb3 file is just a container. The brain is the project.json file. If your ZIP has this file, unless you know JSON syntax. Editing this manually allows you to set high-quality settings that the Scratch editor sometimes hides.
or a dedicated "Unzip" tool to rename the extension manually. 3. Verify the Project
mv my_optimized_project.zip my_project.sb3
Since .sb3 files are technically just renamed .zip files containing JSON data and media assets, "quality" is determined by how well you preserve the original assets without Scratch's automatic compression downgrading them.
If your images look blurry after conversion, check if they were converted to bitmap during the import process. Keep them as SVGs.
The .sb3 file is just a container. The brain is the project.json file. If your ZIP has this file, unless you know JSON syntax. Editing this manually allows you to set high-quality settings that the Scratch editor sometimes hides.
or a dedicated "Unzip" tool to rename the extension manually. 3. Verify the Project zip to sb3 extra quality
mv my_optimized_project.zip my_project.sb3 zip to sb3 extra quality
Since .sb3 files are technically just renamed .zip files containing JSON data and media assets, "quality" is determined by how well you preserve the original assets without Scratch's automatic compression downgrading them. zip to sb3 extra quality
If your images look blurry after conversion, check if they were converted to bitmap during the import process. Keep them as SVGs.