The main feature is bidirectional highlighting: - Click a line of HTML/CSS in the editor, and the matching element on the preview lights up and scrolls into view. - Click an element on the rendered page, and the editor jumps to the corresponding line of code. It makes debugging, learning HTML/CSS, and teaching frontend basics much easier. Built with vanilla JavaScript, 100% client-side (no backend, no data collection), and completely free to use.
