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Free performance tool

Website Speed Test

See how fast a page loads on mobile and desktop, and what is slowing it down, in plain English.

What this tool checks

  • Performance, accessibility, best-practice and SEO scores for mobile and desktop
  • Core Web Vitals from real Chrome users when Google has enough data, otherwise lab measurements
  • The biggest opportunities to speed the page up, ranked by estimated time saved

Good to know

Results come from Google PageSpeed Insights, which tests one page at a time from Google's servers on a simulated device and network. Lab scores vary a little between runs; real-user data reflects the last 28 days. Results are cached for an hour.

No email wall: run as many checks as you like. The server-based tools only read public pages, the same way a browser or search engine does.

Frequently asked questions

Why is my mobile score so much lower than desktop?

The mobile test simulates a mid-range phone on a slower mobile connection, so heavy images, large scripts and slow servers hurt far more. Most visitors to service businesses arrive on mobile, so the mobile result is usually the one to work on first.

What is the difference between field data and lab data?

Field data comes from real Chrome users who visited the page over the past 28 days (the Chrome UX Report); it is what Google uses for Core Web Vitals in search. Lab data is a single simulated test run, useful for diagnosing problems. Smaller sites often have no field data, so the tool shows lab results instead.

Does page speed affect Google rankings?

Core Web Vitals are part of Google's page experience signals, but relevance and content quality matter far more. Speed tends to matter most for conversions: a slow page loses visitors before they read your offer.

Why does my score change each time I run the test?

Network conditions, server load, ads and third-party scripts vary between runs. Small swings are normal; look at the trend and the specific opportunities rather than a single number.

Is a score of 100 necessary?

No. A score in the green (90+) is excellent, and many fast-feeling sites sit in the 70s or 80s. Aim for "good" Core Web Vitals and fix the largest opportunities first.