Updated - Convert Zip To Sb3

Right-click (or Control-click) the file and select .

: Select Compress to ZIP file (or Send to > Compressed (zipped) folder ). Mac : Select Compress [X] Items . A new ZIP file will be generated inside that folder.

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How to Convert ZIP to SB3 (Updated Guide) Scratch is one of the most popular platforms for learning how to code. It saves projects using the .sb3 file extension. However, an .sb3 file is actually just a compressed archive containing JSON code, images, and audio assets. Because of this structure, creators often find themselves needing to manually pack or unpack these files.

If you prefer not to mess with file extensions manually, several free web-based utilities can handle the conversion securely in your browser. Right-click (or Control-click) the file and select

If you have several separate folders containing project assets, this feature could bundle them into individual SB3 files in one click. How it works:

If you're not comfortable renaming files or are using a device that doesn't let you (like a Chromebook), online tools are a perfect alternative. Many of these tools work directly in your browser and are updated for 2026. A new ZIP file will be generated inside that folder

If any of these components are missing or placed in the wrong folder structure, Scratch will fail to load the project. Method 1: The Direct File Extension Renaming (Fastest)

Rename this new file and change its extension from .zip to .sb3 using the steps from Method 1. Method 3: Loading the ZIP Directly into Scratch