Zoomable sunburst implementation in D3. A combination of multiple different sunburst implementations, but I can't remember which ones.
Load a CSV file using the "Browse..." button (or whatever it's called in your browser). Click on a segment to zoom in on it, click in the middle to zoom out.
The "min to show" value determines the minimum number of items required to show a branch. If you want to change it, you must do it before loading a CSV file; it can't be modified after a file has been loaded.
To load a new file, you must reload the page.