Draggable floating button that copies ANY webpage as clean Markdown. Handles articles, code blocks, tables, images, videos (HLS/MP4/blob), iframes, Jupyter notebooks (API fetch + .ipynb download + all-files export), transcripts, math (KaTeX/MathJax), forms, Next.js __NEXT_DATA__, auto-expand dropdowns, LinkedIn profiles, full-page scroll-to-load capture, and more.
