What is a PSJR file? A PSJR file is a project created by PBS Kids ScratchJr, a simplified version of the ScratchJr programming app designed for young children. It is a Zip-compressed archive that stores the contents of a ScratchJr project, including characters, backgrounds, sounds, and block-based scripts that control how characters move and interact. Since the PSJR format bundles everything included in the project, students and teachers can share a PSJR file across devices running PBS Kids ScratchJr, making it easy to transfer or back up projects.

More Information PSJR file open in PBS KIDS ScratchJr 2 PBS Kids ScratchJr helps children learn basic programming ideas such as sequencing, loops, and events through visual, drag-and-drop blocks rather than typed code. The app uses the PSJR format to save a project in a single compressed file ( .ZIP file renamed as a .psjr file). Inside this file, the project's assets and configuration data are stored in several folders. An example of the contents of a PSJR file: backgrounds folder - Stores the background .PNG images in the project. characters folder - Stores the .SVG graphic of the project's character. thumbnails folder - Stores a thumbnail PNG of the background in the project. data.json - A .JSON file that contains information about the movements of the character. NOTE: PSJR files are similar to .SJR files, which Scratch Jr uses to save projects.