Test Website Speed & Performance Online
Analyze your page's loading performance using the Navigation Timing API. Measure Time to First Byte, DOM load time, total resources, and transfer size - with actionable optimization tips.
Website Speed Test
Analyze page performance with Google PageSpeed Insights
Runs a full Lighthouse audit via Google PageSpeed Insights for both mobile and desktop.
What This Tool Measures
- Lighthouse Performance Score
- A weighted composite score (0-100) based on Core Web Vitals and other performance metrics. 90+ is considered good.
- Core Web Vitals
- LCP (loading), INP (interactivity), and CLS (visual stability) -- the metrics Google uses for page experience ranking. Where available, real-user field data from the past 28 days is shown alongside the lab run.
- Accessibility, Best Practices, and SEO
- Additional Lighthouse audits covering WCAG compliance, modern web standards, and search engine optimization.
- Improvement Opportunities
- Actionable suggestions with estimated time and size savings, prioritized by impact.
Quick Start
- 1Navigate to the page you want to test
- 2Click Run Speed Test
- 3Review performance metrics and scores
- 4Follow optimization recommendations
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Looking for FAQs and advanced options? Visit the full Website Speed Test page →