Okapi XLIFF Toolkit
· The Okapi Framework is a cross-platform and free open-source
set of components and applications that offer extensive support for
localizing and translating documentation and software.
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 xlifftk-build-okapi-1.1.11.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.