ONLINE BINDERS

Technology is disclosed for organizing, managing and sharing data files as pages of an online binder (“the technology”). In various embodiments, the technology stores multiple data files received in multiple formats from multiple sources as pages of the online binder. The pages of the online binder are of a common format. The common format allows the pages, that is, the data files corresponding to the pages, to be accessed using a variety of devices regardless of a platform of the devices. The online binder is platform agnostic. The technology provides tools to create notes for the pages of the online binder. The notes can include text annotations, drawings, or audio visual annotations, including a recording of the user actions as presented on the device of the user. The technology provides a collaboration service for sharing the online binder with multiple users asynchronously or in real-time.