The nand2tetris hdl visualizer is a vs code extension that quickly generates beautiful visualizations of nand2tetris hdl files. This extension makes use of the hdl-parser tool (https://www.npmjs.com/package/hdl-parser) and the HDElk tool (https://davidthings.github.io/hdelk/).
The following video shows the extension in action: (https://www.youtube.com/watch?v=6lF45ffVOqo).
This extension was developed by Pranav Jain. This tool was a direct followup to this hdl visualizer project (https://github.com/tcheinen/nand2tetris) which was developed by Pranav Jain, Robert Blum, Teddy Heinen, Aniket Patel, and Nikith Shivani.