Click to browse, or drag an .html file here
Or paste HTML source directly into the box below (view-source / Ctrl+U on any page)
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Why paste HTML instead of a URL? Browsers block JavaScript on one site from reading the raw HTML of another site (CORS) — that's a security feature, not a limitation of this tool. Pasting the source (or the file itself) is the only way a free, server-less tool can reliably analyze any page. Everything runs entirely in your browser.