The most direct way to "convert" is by changing the file extension. Scratch 3.0 projects are saved as archives, so if you have a valid Scratch project structure inside a ZIP, follow these steps:
If you have a collection of Scratch assets (like sprites, sounds, and a project.json file) inside a ZIP folder and want to turn it back into a playable Scratch project, follow these steps: convert zip to sb3 updated
: If assets are missing, check that all original media files from the project are included in the ZIP before renaming it to SB3. file before converting it back to SB3? How can I directly modify a .sb3 file? - Discuss Scratch The most direct way to "convert" is by
: Go to the Scratch Editor , click File > Load from your computer , and select your new .sb3 file. 2. Modern Conversion Tools (Updated 2026) How can I directly modify a
Converting a ZIP file to SB3 can be useful in various scenarios:
: Right-click and choose Compress to ZIP file (Windows) or Compress [X] Items (Mac). Rename : Rename the resulting Archive.zip to MyProject.sb3 . 3. Using Online Tools