Free · Network Tools

Website Speed Test

Measure load performance, Core Web Vitals and optimization opportunities with a real Google Lighthouse audit — mobile and desktop.

Website URL

Paste a full page URL (a path or query string is fine). A real audit runs on Google’s servers and takes about 30–60 seconds.

Strategy:

What the timings actually measure

TTFB isolates server-plus-network latency — slow TTFB is backend work; slow render afterwards is frontend weight.
DNS/connect/TLS phases split connection cost so you can see whether round-trips or handshakes dominate.
Test from the same region as your users — cross-continent numbers measure geography.

Speed numbers you can act on

⚡

A real Lighthouse audit

No estimates: every score, metric and suggestion comes from a genuine Google PageSpeed Insights audit of the live page, run on Google’s servers with their real phones and network conditions.

🌐

Core Web Vitals plus user reality

See LCP, INP and CLS rated good / needs improvement / poor — the same metrics Google Search uses — and, when available, real Chrome users’ field data from the Chrome UX Report.

📈

Share a report in one click

Generate an 8-character share link that recreates exactly the report you saw, without an account and without sending your URL anywhere but Google.

What is a website speed test?

A website speed test measures how fast a page loads and how smooth it feels to interact with — and, more usefully, it tells you exactly what is slow and what to fix. This tool runs a real Google Lighthouse audit on Google’s own servers: the same open-source auditing engine that powers Chrome DevTools, browsing the live page just like a visitor and measuring scores instead of guessing. You get four category scores, the Core Web Vitals that Google Search uses (LCP, INP, CLS), supporting metrics such as first paint, server response time and blocking time, the page’s weight and request count, and a ranked list of optimization opportunities with the seconds each one can save.

What this tool shows

Performance, Accessibility, Best Practices and SEO scores on a 0–100 scale
Core Web Vitals — LCP, INP, CLS — each rated good / needs improvement / poor
FCP, TTFB, TBT and Speed Index for a fuller picture of the loading story
Page size, number of requests and main-thread work
Ranked optimization suggestions with estimated time savings
Real-user field data from the Chrome UX Report when Google has enough samples

When to use it

Before a redesign or front-end migration, to record a performance baseline
After changing images, fonts, scripts or hosting, to confirm the change helped
To prioritize fixes: the suggestions list is ordered by estimated payoff
When Google Search reports slow loading, to replay the exact scenario Google sees

Privacy note: testing sends the URL you entered to Google’s PageSpeed Insights API — the audit genuinely runs on Google’s servers, so that is the only place the URL leaves the browser. This site caches the result for up to an hour, does not require an account, and stores nothing about you.

Frequently asked questions

What does a website speed test actually measure?

This tool asks Google PageSpeed Insights to run a real Lighthouse audit of the live page on Google’s servers, then presents the four category scores (Performance, Accessibility, Best Practices, SEO), the Core Web Vitals (LCP, INP, CLS and their good/needs-work/poor ratings), supporting lab metrics (FCP, TTFB, TBT, Speed Index), page weight and request counts, and the ranked optimization opportunities with their estimated savings. Mobile and desktop are separate audits.

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

Lab data comes from a Lighthouse audit just run on a synthetic device right now. Real-user data comes from the Chrome UX Report — aggregates of actual Chrome visitors’ measurements on the URL. Field data only appears when Google has enough samples, and it can differ from the lab numbers: load on a real phone in the real world is affected by network type, device and page changes over time.

Is a speed test free? Does this site see my URL?

Yes, it is free: no account and no credits. The only place your URL leaves the browser is Google’s PageSpeed Insights API, which actually runs the audit. Results are cached for up to an hour so repeated tests of the same page don’t burn the shared Google quota; nothing else is sent and nothing is stored about you.