Free tool

Website speed test: how fast does your site load?

Free website speed test with Google Lighthouse and real-user data (CrUX). See your PageSpeed score, your Core Web Vitals (LCP, INP, CLS) on mobile and desktop, and the fixes that save the most time.

Your PageSpeed score plus Core Web Vitals (LCP, INP, CLS)
Real-user data from the last 28 days, when Google has it
Load time, server response time and more, for mobile and desktop
Concrete improvement points with the biggest time savings first

Why speed makes or breaks your conversion

Speed is not a technical detail, it is revenue. The longer your page takes to load, the more visitors drop off before they see anything at all. Research links every extra second of load time to a noticeable drop in conversion and a higher bounce rate.

Google measures this via the Core Web Vitals: LCP (load time), INP (responsiveness) and CLS (visual stability). They determine not only your user experience, but also partly your position in the search results.

What does this tool do?

We run your page through Google Lighthouse and the real-user data from Chrome (CrUX), exactly like PageSpeed Insights. You get your score, your Core Web Vitals and the improvement points with the biggest time savings, so you know where to start.

The Core Web Vitals come from real-user data over the last 28 days where possible, at the 75th percentile. When your page has too little traffic, we use the data for your whole domain, just as Google explains for PageSpeed Insights. Without field data, you see the lab measurement.

Want to see what a faster site brings you? Calculate it with our conversion rate calculator.

Frequently asked questions about the PageSpeed test

How is this different from Google PageSpeed Insights?

We use the same Google API as PageSpeed Insights: a Lighthouse lab run plus real-user data from Chrome (CrUX). You get the same measurements, presented more compactly, in your language and with the fixes sorted by time saved.

What is the difference between lab data and real-user data?

Lab data is a single run in a controlled environment and is useful for finding problems. Real-user (field) data comes from Chrome users over the last 28 days, and it is what Google uses to assess your Core Web Vitals.

Why do I not see real-user data for my page?

Google only shows field data when there are enough Chrome visitors. If a single page has too little traffic, the test falls back to the data for your whole domain. If the domain has too little traffic as well, you only see the lab measurement.

What counts as a good score?

Google rates your Core Web Vitals as good when 75% of visits stay within these limits: LCP up to 2.5 seconds, INP up to 200 milliseconds and CLS up to 0.1. A Lighthouse score of 90 or higher is green.

Why does my score change with every test?

A lab run depends on the network, the server load and third-party scripts at that moment. Swings of a few points are normal. Look mainly at the real-user data and at trends, not at one score.