CC3.SB3 files contain assets. To view assets, change file extension to ZIP. Open with Windows Zip utility or Apple Archive Utility. Over 400 file formats open with File Viewer Plus. Download free.
CUEcards software opens CC3 files. It allows making structured notes. CC3 stores CUEcards data. Default software is CUEcards 2000.
Scratch 3.0 file format stores projects and sprites as ZIP archives. These have JSON data and media in separate files. Projects use .sb3 extension. Sprites use .sprite3.
Sprite files are like project files. JSON file is sprite.json and represents sprite as target.
SB3 projects have project.json file. It has info like sprites, scripts, costumes, sounds. Convert to other formats using file converters.
To open SB3 files without Scratch 3.0, unpack ZIP archive. May need to change SB3 extension so tool recognizes it.
Scratch 3.0 uses SB3 as default project format. Online and Windows/macOS versions available. For online, download to computer to save. For desktop, upload from computer to open.
Programs supporting SB3: Scratch, SB3 to SB2 Converter.
SB3 files can be harmful from unknown sources. Check file extensions match expected format to avoid errors. Main format is Scratch Project Format. Created by MIT Media Lab.
Common problem is SB3 not associated to program. Shows in unusual apps or no program. To fix, double-click SB3 file to open. If can’t open, find app to open it or use File->Open menu option.
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Scratch 3.0
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GIMP