for file in *.zip; do mv "$file" "$file%.zip.sb3" done To validate the conversion:

Converting a standard ZIP (like a folder of photos) to SB3 will fail. The ZIP must contain Scratch project data (specifically project.json ). Method 1: The “Quick Rename” Trick (Windows & Mac) This is the fastest method, but it only works if the ZIP file originally came from an SB3 file.

Last Updated: October 2025