HeavyRender works on the server side, using GPU buffer caching, graphics APIs, and a Vega-based interface to generate custom pointmaps, heatmaps, choropleths, scatterplots, and other visualizations. HEAVY.AI enables data exploration by creating and sending lightweight PNG images to the web browser, avoiding high-volume data transfers. Fast SQL queries make metadata in the visualizations appear as if the data exists on the browser side.