ZK Framework

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ZK is the leading open source Ajax + Mobile framework. With over 1,000,000 downloads, ZK empowers a variety of companies and institutions, ranging from small to large, including Barclays, Sun Microsystems, Swiss RE, Alcatel-Lucent, and many others.

Rich User Experience

Leverage over 200 off-the-shelf, state-of-art, Web Accessibility compliant Ajax components with versatile RIA features to create a responsive and engaging user experience maximizing users’ satisfaction and work efficiency.

Direct RIA

ZK boosts developer’s productivity allowing direct manipulation of UI, database and enterprise resources. With direct programming, developing web applications is as straightforward and intuitive as programming desktop applications.

Open Source

ZK is the leading open source Ajax + Mobile framework. The ZK developer community is extremely active with over 20 translations, 100 articles/blogs, 100,000 lines of codes, 1,000,000 downloads from 190+ countries.


ZK is a standard-compliant solution. With XUL and HTML compliant components, ZK protects you from behind-closed-doors and proprietary technologies. ZK also complies with JSP, JSF, Portlet and Java EE technologies, including the ability to integrate with existing enterprise environments and Java IDEs.

Markup and Script Languages

ZK applications can be built using pure Java, markup and/or scripting languages. With XUL/XHTML, designing rich UIs is as simple as authoring HTML pages and with Java, Groovy and various other scripting languages supported, developing applications is as rapid as prototyping.

Direct Push

ZK provides exceptionally robust and intuitive Direct Push technology enabling spontaneous updates sent by the server to the Ajax browsers and mobile devices. With ZK’s Direct Push technology, responsive and dynamic enterprise solutions can be created at minimal cost.

Extensibility and Customizability

ZK is fully customizable and extensible with a modular plug-and-play architecture. With CSS, templates and macro components, the look and behavior of components can be changed dramatically without modifying the application. With a pluggable UI factory, each user can have a custom UI which is loaded from a database or other resources. Click herefor a complete list of supported platforms.


ZK is designed from the ground up to be secure. ZK protects enterprise applications from cross-site scripting, malicious JavaScript/SQL injection, exposure of client-side business logic, and exposure of business data in transit.

Scalability, Clustering and Failover

ZK supports high scalability and availability with serializable user interfaces, and a pluggable failover manager. ZK is also compatible with the clustering and load balancing support found in modern application servers.

Mobile Access

ZK extends the reach of enterprise Internet applications to 1 billion mobile devices with minimal cost. ZK supports Java Mobile, Android, and various mobile browsers.

Enterprise Support

ZK technical support is designed to save development time and enable enterprises to achieve the highest level of user experience, productivity, and performance. Some of our supported customers include Sun Microsystems, Swiss Re, Unisys and MMC, just to name a select few.


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