PageSpeed Badge — Core Web Vitals Monitor

See LCP, FCP, and CLS scores for any webpage in real time. Color-coded badge on the toolbar... | Not affiliated with Anthropic, PBC.

PageSpeed adds a persistent Core Web Vitals badge to every tab, showing you LCP, FID/INP, and CLS scores at a glance. Click the badge for a full Lighthouse performance breakdown — all without switching to a separate tool or opening DevTools. **Key Features:** - Live CWV badge (LCP, FID/INP, CLS) visible on every page - Color-coded scores: green (good) / amber (needs improvement) / red (poor) - Full Lighthouse audit on demand: Performance, Accessibility, SEO, Best Practices - Historical score tracking per domain - Mobile vs. Desktop score comparison - PageSpeed Insights API integration for field data - No sign-in or configuration required **Who is it for?** Frontend developers optimizing page performance, SEO specialists monitoring Core Web Vitals for ranking impact, developers running quick performance checks during development, and technical marketers who need fast performance data without opening Lighthouse manually. **Privacy & Trust:** The current page URL is sent to the PageSpeed Insights API for performance scoring. No personal data or browsing history is collected. Anonymous analytics via Google Analytics 4 only. Install PageSpeed — know your Core Web Vitals on every page.