course-attribute-editor
· This tool allows administrators to view the identity attributes (including the SIS IDs) of any Canvas course and to edit the attributes of non-SIS courses and sections.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window course-attribute-editor-5.0.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.