An SB2 file is a program created with Scratch, an application development platform created at the Massachusetts Institute of Technology (MIT). It contains Scratch programming language code used for creating stories, small games, and animations. SB2 files replaced the original Scratch .SB files.

SB2 file open in MIT Scratch 2 SB2 files are saved in the Scratch 2.0 file format. The SB2 file is simply a .ZIP archive that stores contents such as sprites, scripts, costumes, and sound files. You can extract the contents of an SB2 file with a Zip-compression utility, such as Microsoft File Explorer, Apple Archive Utility, 7-Zip, Corel WinZip, or RARLAB WinRAR. To create an SB2 file: Open the "Scratch Project Editor" on the MIT Scratch page. Create your animations and select File → Download to your computer in the browser window. Name your file, choose the save location, and click Save. NOTE: A Scratch project may be compiled as a Java archive (.JAR file), which can be run in a web browser.