Right-click (or Control-click) the file and select .
Before we begin the conversion process, let’s understand the architecture. In 2019, MIT released Scratch 3.0, which switched the project file format from .sb2 to .sb3 . An .sb3 file is actually a compressed ZIP archive containing:
Because an .sb3 file is natively structured as a ZIP archive, converting between the two formats does not require complex file-conversion software. Instead, it requires proper file structure and the correct extension renaming techniques. Method 1: The Direct Extension Rename (Fastest Method)