GeoToolkit is a suite of 2D and 3D data visualization libraries that display well log, seismic, contour, schematics, BHA, maps, and more in JavaScript. Released earlier this year, GeoToolkit.JS 2020 comes with various new features and significant improvements. Highlights from the latest release include: improved ArcGIS support, faster load times, new tools, multilateral schematics, new gridding algorithms, and improved memory for volumetric rendering.