Jar Explorer 2.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is categorized as System Tools. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is Igor Polevoy.
From the developer:
This is a desktop Swing application which will recursively scan a directory and index a large number of jar files all at once. It then allows to explore individual jar files or search all jar files at the same time. It provides a number of views for resources: class - specific, shows all class information: interfaces, superclass, methods, fields, as well as views for text, HTML, images.
You may want to check out more Mac applications, such as Air Explorer, Jar of Marbles II: Journey to the West or KeyStore Explorer, which might be similar to Jar Explorer.