Abstract: Web applications such as email, photo-sharing website, or web widgets work only when the offsite server is available to provide content in real-time. The present invention provides a generic web standards based method of encapsulating the offline web application along with its runtime environment so that web applications can run even when connection to the server is not available. In addition the present invention combines methods for creating, provision, and running multiple offline web applications on a desktop computer or a mobile device such as cellular telephone or personal digital assistant. In addition the present invention also provides the ability to synchronize user data so that multiple devices can be provisioned for offline use with the same set of personalized user information.