Jmol is a free, open source viewer of molecular structures useful for students, educators and researchers in chemistry, biochemistry and other fields dealing with molecular structure. It is cross-platform, running on Windows, Mac OS X, and Linux/Unix systems.

• The Jmol application is a standalone Java application that runs on the desktop.
• The JSmol is an object that can be integrated into web pages. It does not require Java, since it runs using just the browser's HTML5 and JavaScript engines..
• The JmolViewer is a development tool kit that can be integrated into other Java applications.