Convert Zip To Sb3 [upd] Jun 2026

Developers, educators, and advanced Scratchers frequently move files between these two formats for several reasons:

The easiest way to convert a ZIP file to SB3 is by using the Scratch website. Here's how:

To replace multiple sounds or costumes at once by manipulating the files directly.

: If you need to optimize 50 audio tracks or upscale 30 costumes, doing it inside the Scratch editor is tedious. Extracting the project to a ZIP allows you to batch-process assets using professional external tools like Photoshop or Audacity. convert zip to sb3

If Scratch cannot open your renamed file, it is likely due to structural issues within the ZIP:

if you haven’t already. You should see a folder containing:

Ensure your ZIP file contains the necessary Scratch assets at the root level (e.g., project.json and asset files like .svg or .wav ) rather than being inside a subfolder. Right-click the file and select . Change the extension from .zip to .sb3 . Extracting the project to a ZIP allows you

If you manually zipped components together, make sure the project.json file is present in the root directory of the archive. Scratch cannot read the project without this file.

: Click the file, press "Enter" to edit the name, and change .zip to .sb3 .

If you simply zipped up the original, unmodified contents of a Scratch project, or if you just renamed an SB3 file to ZIP earlier and want to change it back, this is the fastest method. On Windows: Open . Right-click the file and select

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If you have unzipped an SB3 to edit its contents, or if your ZIP contains a folder with assets, follow this method.