Here we present a new implementation of Phylocanvas, written to incorporate WebGL (Web Graphics Library), a JavaScript API to render graphics in most modern web browsers without the use of plug-ins. WebGL allows GPU-accelerated image processing as part of the web page canvas thereby enabling Phylocanvas.gl to both render very large trees and allow interactivity via Javascript events. The primary result of this is that rendering the tree is much quicker compared to using the HTML canvas element allowing trees of 100K+ nodes to be displayed