Oracle GlassFish Server is the world's first implementation of the Java Platform, Enterprise Edition (Java EE) 6 specification. Built using the GlassFish Server Open Source Edition, Oracle GlassFish Server delivers a flexible, lightweight, and production-ready Java EE 6 application server.

Oracle GlassFish Server (GlassFish Server) provides the server environment needed for the development and deployment of Java Platform, Enterprise Edition (Java EE platform) applications and web technologies based on Java technology.

GlassFish is the Eclipse implementation of Jakarta EE (formerly the reference implementation from Oracle) and as such supports EJB, JPA, JSF, JMS, RMI, JSP, servlets, etc. This allows developers to create enterprise applications that are portable and scalable, and that quickly become legacy technologies. Optional components can also be installed for additional services.