In accordance with embodiments, there are provided mechanisms and methods for facilitating dynamic zero-downtime updating of formats of software applications in an on-demand services environment. In one embodiment and by way of example, a method includes receiving a request to facilitate a format change to a current version of a software application at a computing device, and retrieving a trigger corresponding to the format change, where a trigger may include a version indicator to indicate a past version of the software application relating to the format change. The method may further include comparing the current version and the indicated past version of the software application, and invoking the format change to the current version of the software application based on the retrieved trigger and the version indicator.