Free SEO Tool · by overrank
Free Page Speed Check (Core Web Vitals)
Slow pages do not rank. Google has been using Core Web Vitals as a ranking signal since 2021, and the bar has only gotten higher. This tool runs the real Google Lighthouse on your URL (mobile + desktop) and gives you the same scores you would see in Search Console.
Paste a URL. We test on both mobile and desktop, return all four Lighthouse category scores plus the Core Web Vitals (LCP, INP, CLS, FCP, TTFB), and surface the top opportunities Lighthouse found. Free, no signup. 10 tests per browser per day.
✦ This is 1 of 30+ things overrank automates
overrank publishes articles built for Core Web Vitals — server-rendered, lazy-loaded, image-optimized.
Every article we publish hits 90+ Performance scores by default. So speed is one less thing to worry about.
No credit card · takes 60 seconds
Frequently asked questions
What are Core Web Vitals?
Three metrics Google uses to score user experience: LCP (Largest Contentful Paint, how fast the main content loads, should be under 2.5s), INP (Interaction to Next Paint, how responsive the page feels, should be under 200ms), and CLS (Cumulative Layout Shift, how much things jump around, should be under 0.1). Google uses these as a ranking signal.
Why is mobile slower than desktop?
Lighthouse simulates mobile devices on a slower CPU and a Slow 4G network. That is intentional — most real users are on mobile, often on patchy connections. The mobile score is the one to optimize first if you have to pick.
What is a good Performance score?
90+ is excellent. 50-89 needs improvement. Below 50 is poor. For real ranking impact, focus on the mobile Performance score and the Core Web Vitals — those are the actual ranking inputs. The other categories are good hygiene but not ranking factors.
Does this use Google's real Lighthouse?
Yes. This tool calls Google's official PageSpeed Insights API, which runs the actual Lighthouse engine on Google's servers. The scores are identical to what you would see in Search Console or developers.google.com/speed.
How can I improve my Performance score?
Three biggest levers: (1) compress and resize images, (2) eliminate render-blocking JavaScript and CSS, (3) reduce server response time (TTFB). The 'Top opportunities' section above lists the specific fixes Lighthouse found, ranked by impact.