Page speed: Core Web Vitals from real visits, page by page
See which pages load slowly, and for whom.
Start free. No card needed. Plans and limits are on the pricing page.
What Site health shows for speed
Convertlyft measures page speed in the browsers of the people visiting your site, not in a lab test. Site health rates how fast it loads for most visitors (LCP), how quickly it reacts to a tap (INP) and how much the page jumps (CLS), with when something first shows (FCP) and how fast the server answers (TTFB) alongside, for the typical visitor against Google’s thresholds, and lists the slowest pages.
- What to fix first. The page whose poor loads held up the most visits, how many of its loads were poor, and the measure that crossed the line most often.
- Five measures for the typical visitor. Each is the value 3 in 4 page loads beat, the reading Google judges a site by, shown against Google’s good and poor lines, with the share of loads in each and the period before.
- Pages with poor loads. A load is poor when any measure crossed Google’s poor line. Pages are ranked by how many loads were poor.
- Who it hit. Open a page to see what crossed the line, and the visits, devices and countries behind its poor loads.
From a slow page to what crossed the line
Pages with poor loads puts the page that held up the most visits first. Open it for which measure crossed Google’s poor line and how often, then add a to-do for it. Files that didn’t load and code that broke are in Errors, sorted by whose code they are.
From a slowdown to the change to make
What to do lists to-dos, each with the measurement behind it and one change to make where there is one. When a page loads in 1.6 times its usual time for the slowest quarter of visits, with at least 20 readings today and before, it adds a to-do under Broken that names the page and both times: how long it took for the slowest quarter of visits today, and how long it usually takes. When you have made the change, press I fixed it; the next check marks it Confirmed fixed or Came back.
What is measured, and what is left out
Every reading comes from a real visit, phones and desktops both counted. Your own visits are left out. How much the page jumps (CLS) is measured only in browsers that report it: Safari and Firefox don’t. How quickly it reacts to a tap (INP) counts only the loads where someone tapped, clicked or typed.
Your AI tools can read page speed too
Convertlyft is an MCP server at https://mcp.convertlyft.com/mcp. A connected AI app can read your site’s page speed with the rest of its data. Connect your AI →
How to check your page speed, step by step
- Start free. No card needed.
- Add the line of code. We spot Shopify, WordPress, Wix, Squarespace, Webflow, Framer, Next.js or a tag manager and show the steps.
- Mark your own devices once: visits from devices you’ve marked as yours are left out.
- Open Site health: what to fix first, the five measures for the typical visitor, and the pages with poor loads.
- Add a to-do from a slow page, and press I fixed it once you have made the change.
What it costs
Convertlyft is free up to 5,000 visits a month, with recordings, heatmaps, funnels and errors on every plan. The full table of plans is on the pricing page. Your new account starts on Pro at 10,000 visits a month, free for 14 days. No card needed. See Site health on demo data →
Check your site free first: an SEO audit of up to 25 pages, no account.
Questions
What are Core Web Vitals?
Google’s measures of how a page feels to the people loading it: how fast it loads for most visitors (LCP), how quickly it reacts to a tap (INP) and how much the page jumps (CLS). Convertlyft shows them with when something first shows (FCP) and how fast the server answers (TTFB).
Where do the numbers come from?
From real visits: each one is measured in the browser of the person visiting your site, not in a lab test. Your own visits are left out.
Which number does Google judge a page by?
For each measure, the value 3 in 4 page loads beat. Site health shows that reading for the typical visitor, against Google’s good and poor lines, and the share of loads in each.
How do I find my slowest pages?
Site health lists the pages with poor loads, ranked by how many loads were poor, so the page that held up the most visits comes first. A load is poor when any measure crossed Google’s poor line.
What happens when a page gets slower?
When a page loads in 1.6 times its usual time for the slowest quarter of visits, with at least 20 readings today and before, What to do adds a to-do under Broken that names the page and both times: how long it took for the slowest quarter of visits today, and how long it usually takes.
How much does Convertlyft cost?
Free up to 5,000 visits a month, with every feature. The plans above that are on the pricing page.
Start on Pro, free for 14 days
Your new account gets 10,000 visits a month, no card needed. After 14 days it moves to Free, up to 5,000 visits a month with every feature, unless you choose Pro.