Site Health
Mobile Preview
Paste any website URL and see how it looks on a phone-sized screen — switch between small, standard, and large phone widths.
📌 This loads the URL directly in an embedded frame. Many sites block being framed (X-Frame-Options / CSP security setting) — if the preview stays blank, that's the site's own protection, not a bug here. In that case, use Google's Mobile-Friendly Test instead.