If you are on a mobile device (like an iPad or Chromebook) where renaming file extensions is difficult, online tools can help.
If you’ve ever tried to open a Scratch project only to find a folder full of JSON files and random assets instead of a playable game, you aren’t alone. Many users accidentally end up with a ZIP file when they meant to have an .sb3 file. convert zip to sb3
Delete the .zip at the end of the filename and type .sb3 instead. If you are on a mobile device (like
Some community-made "Scratch Tools" or "Project Downloaders" allow you to upload assets and export them directly as a finished SB3. Troubleshooting Common Issues Delete the
Usually, this happens because a computer or browser "unzipped" the project automatically, or a user manually changed the extension to .zip to look at the code. Because SB3 files use ZIP compression, computers often treat them as interchangeable—but the Scratch editor only recognizes the .sb3 extension. Method 1: The Quick Rename (Easiest)
