JavaServer Faces (JSF) is a user interface framework for building web applications that run on the server side and render the user interface back to the client.

It lets you develop tools that simplify coding web-based Java applications.

Users of your JSF-based web applications can use the wide range of user actions made available by JSF controls. More features can be offered more conveniently than they can be with a standard HTML front end. JSF requires little more effort than an ordinary JSP configuration but still has more benefits.