If I may, I'd suggest two possible improvements: 1. Display the actual points (including control points) in the SVG below, connected by dotted straight lines, 2. Highlight the respective point + axis when hovering a table cell. If you're open to these suggestions, I'll happily lend a hand in adding them. Forgot 3.: highlight the segment of the generated path string (possibly implies wrapping the string to display one command per line).

Those are all *awesome* suggestions (the first two of which crossed my mind while I was putting this together). I don't have much time this week to create them myself, but would *very happily* accept any suggestions!