DOM complexity analyzer

The analysis runs in this tab through the browser's own HTML parser, so a fragment is measured as the document a browser would build from it, implicit html, head and body included. Text and comment nodes count only when they carry characters. This tool cannot fetch a URL, run JavaScript, or see what your framework renders at runtime; paste the rendered markup from devtools instead. The thresholds come from Lighthouse's DOM size audit guidance, not from this site.