The SWEET (Space Weather Exploration and Evaluation Technologies) demonstrator currently provides access to a rich dataset of pre-processed electron density observations based on the Neustrelitz Electron Density Model (NEDM) model and IMPC based calibrated slant total electron content (STEC) data assimilated into the model by using the 3DVAR approach. The current version of the demonstrator covers data (4D NEDM values and 3DVAR assimilations) for the whole year 2023 with a temporal resolution of 5 minutes and a spatial resolution of 2.5 degrees latitude by 5 degrees longitude. It enables a user to visualise and explore the whole data set including filtering and slicing through its dimensions with a very low latency in a common web browser.