The disclosure generally describes computer-implemented methods, software, and systems for providing a web-based operating system framework for client devices. One computer-implemented method includes receiving portal login credentials from a client device, analyzing, by operation of a computer, configuration data to determine a desired graphical user interface (GUI) for the portal to present on the client device, determining to present a particular web operating system (WOS) GUI configuration on the client device, displaying a graphical element representing an available application on the determined WOS GUI configuration, and monitoring the WOS for GUI interactions associated with the graphical element.