.SB3 File Extension

Scratch 3.0 Project File

Developer MIT
Popularity
4.2  |  982 Votes
Category Developer Files
Format Zip

What is an SB3 file?

An SB3 file is a project created with Scratch 3.0, a program development platform created at the Massachusetts Institute of Technology (MIT). It contains a program written in Scratch programming language, which is used for creating stories, small games, and animations. SB3 files replaced Scratch .SB2 files.

More Information
Screenshot of a .sb3 file in MIT Scratch 3.0
SB3 file open in MIT Scratch 3.0

SB3 files are saved in the Scratch 3.0 file format. SB2 files are saved in the Scratch 2.0 file format and .SB files are saved in the original Scratch file format. The SB3 file is simply a .ZIP archive that stores contents such as sprites, scripts, costumes, and sound files.

To open an SB3 file in the online MIT Scratch editor:

  1. Open the "Scratch Project Editor" on the MIT Scratch webpage.
  2. Select File → Upload from your computer in the browser window.

To create an SB3 file in the online MIT Scratch editor:

  1. Open the "Scratch Project Editor" on the MIT Scratch page.
  2. Create your project and select File → Download to your computer.
  3. Name your file, choose the save location, and click Save.

While SB3 files are typically opened and created in the online MIT Scratch editor, an offline editor for Windows and macOS is also available.

Since SB3 files are compressed with Zip compression you can extract the contents of the files with Zip utilities, such as Corel WinZip, 7-Zip, or Apple Archive Utility. Change the .sb3 file extension to .zip and unzip the file with the Zip utility.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open or reference SB3 files

Windows
Linux
Web
Android
Updated May 17, 2022

Verified by FileInfo.com

The FileInfo.com team has independently researched the Scratch 3.0 Project file format and Mac, Windows, Linux, and Android apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.