In a system and a method, a request from a client device to generate a downloadable file representing an offline version of a web-based application hosted by a web server is received. Application components and data used by the web-based application are packaged into the downloadable file, and the downloadable file is transmitted to the requesting client device. The web-based application is locked to prevent access to the web-based application. A revised downloadable file is received that includes changes to at least one of the application components and the data contained in the downloadable file. As applicable, the application components and data used by the web-based application are updated with the changes to the at least one of the application components and the data contained in the revised downloadable file. Subsequent to the updating, the web-based application is unlocked, and the downloadable file is invalidated.