Convert Zip To — Sb3 Updated

For users uncomfortable with file extensions or when the ZIP contains extracted folders, several updated web tools exist. Be cautious – never upload private or school projects to unknown sites. Recommended options:

How to use:

After conversion, test the file in one of these ways: convert zip to sb3 updated

In 95% of cases, converting a ZIP to an SB3 is as simple as renaming the file. No actual decompression or re-compression is required. The file contents are already correct; only the name is wrong.

However, there is a warning: This method only works if the ZIP file genuinely contains a Scratch 3.0 project internally. If the ZIP file contains multiple loose files (like project.json, 0.svg, 1.wav), you are holding a disassembled Scratch project. In that case, renaming alone will fail. For users uncomfortable with file extensions or when

Sometimes you download a ZIP file that, when opened, reveals a folder full of individual assets (project.json, sound files, image files). This happens when someone unzipped a Scratch project before sharing it. You cannot simply rename this folder – you must re-compress it correctly.

Step-by-step to rebuild an SB3 from a folder: How to use: After conversion, test the file

Why this works: Scratch 3.0 expects the project.json file to be at the root of the ZIP archive, not inside an extra folder. By selecting the internal files directly, you recreate the correct internal structure.

There are a few methods to convert a ZIP file to SB3: