Here is a web-based interface to submit topology optimization jobs based on the Bi-directional Evolutionary Structural Optimization (BESO) method script written by František Löffelmann . Only the most basic features of that excellent tool are available in this web based version.
All elements must belong to a single element set and there can only be one load case. After the script runs it creates several movie files from various viewpoints showing the shape changing . See an example below created from webcalculix.