This only works if the ZIP file’s internal structure matches an SB3. If it contains a folder called something like project/ that holds the JSON file, simple renaming will fail. Use Method 2 instead.
If you want to dive deeper into configuring your files, let me know: What are you currently using? Did you get an error message when trying to load the file? Are you trying to batch convert multiple files at once?
Do not compress the parent folder. Right-click the selected files inside the folder. convert zip to sb3
If you have ever downloaded a project from the Scratch website (scratch.mit.edu) or received a game file from a friend, you might have noticed two distinct file types: and .zip . At first glance, these seem completely different. One is a playable project file; the other is a compressed archive.
: This usually happens if the project.json file is missing or if the ZIP was created by compressing a folder rather than the files inside the folder. This only works if the ZIP file’s internal
Open the extracted folder containing your project.json and asset files.
Since an SB3 file is natively a ZIP archive, the absolute fastest way to convert a ZIP to SB3 is by changing the file extension. On Windows If you want to dive deeper into configuring
To understand how to convert these files, it helps to understand what lives inside them. An .sb3 file is the default file format for Scratch 3.0.