Ksoup
· Ksoup is a Kotlin Multiplatform library for working with HTML and XML, and offers an easy-to-use API for URL fetching, data parsing, extraction, and manipulation using DOM and CSS selectors.
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 ksoup-macosx64-0.1.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.