: Go to the Scratch Editor , click File , then Load from your computer , and select your new .sb3 file. 📄 Anatomy of an SB3 File
: A collection of .svg (vector graphics), .png (raster graphics), and .wav or .mp3 (audio files).
Note: Do not zip the folder itself; zip the files inside the folder.
Converting between ZIP and SB3 formats is simple once you understand that they are essentially the same under the hood. Whether you choose the online method for its convenience and privacy features, the manual method for its control, or the command-line approach for automation, you now have the knowledge to manage your Scratch projects effectively.
This is an incredibly useful technique for: convert zip to sb3
There are a few reasons. Perhaps you received a Scratch project as a ZIP file from someone. You might be recovering assets from a corrupted project. Or you could be a developer building tools that generate Scratch projects programmatically. Understanding how ZIP and SB3 relate helps in all these scenarios.
This is the fastest way to turn a zipped Scratch project into a functional .sb3 file.
Don't look for a converter. It is the official, fastest, and safest way to handle this file type.
Right-click the file and select Rename (or press F2 ). : Go to the Scratch Editor , click
We hope this comprehensive guide has helped you understand the process of converting ZIP to SB3. If you have any questions or need further assistance, feel free to ask!
If your converted file fails immediately, rename it back to .zip , open it, and verify that project.json is visible immediately upon opening the archive. If you see a folder first, uncompress it and re-zip using the exact method outlined in the section above.
Select inside that folder simultaneously (Ctrl+A on Windows, Cmd+A on Mac). Step 2: Compress to ZIP
This design is intentional. It allows Scratch to package a complete, complex project into a single, easily shareable and downloadable file. Because it's a compressed archive, the .sb3 format also helps reduce the file size, making it faster to upload and download. Converting between ZIP and SB3 formats is simple
Because an .sb3 file is just a renamed ZIP archive, converting a ZIP archive back into an .sb3 file is incredibly straightforward. Method 1: The Manual Extension Rename (Fastest Method)
If the file fails to open, it likely means the internal folder structure is incorrect. In that case, you'll need to follow the "Create a New Project" method (the more common approach) rather than simply renaming the file.
This will extract the contents of the ZIP file to a folder called output .