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Website Speed Test & Performance Analyzer

Lighthouse Audit

Test website performance

Enter a URL to analyze performance metrics, Core Web Vitals, and get optimization recommendations.

Tool features

Comprehensive website performance analysis with detailed insights and recommendations
4 checks

Performance Analysis

Comprehensive performance metrics with Lighthouse scores and Core Web Vitals

Real-time Testing

Server-side testing with accurate results from actual browser rendering

Core Web Vitals

Measure LCP, FID, and CLS for Google ranking factors

Actionable Recommendations

Get prioritized suggestions to improve your website performance

What is a website speed test & how it works

Core Web Vitals and the metrics that drive rankings

A website speed test loads a page the way a real browser would and measures how fast it becomes visible and interactive. Modern tests are built around Core Web Vitals — Google's user-centric metrics for loading, interactivity, and visual stability — because they correlate directly with bounce rate, conversions, and search ranking.

This tool runs a Lighthouse-style audit against the URL you provide and reports the key metrics alongside prioritised, plain-language recommendations. Rather than a single vague score, you get the specific opportunities — oversized images, render-blocking scripts, slow server responses — that are actually holding the page back.

LCP
Largest Contentful Paint — how long until the main content renders. Aim for under 2.5 seconds.
CLS
Cumulative Layout Shift — how much the page jumps around while loading. Aim for under 0.1.
TTFB
Time To First Byte — how quickly the server starts responding. High TTFB points to backend or hosting issues.

How to use this tool

Audit a page's performance in four steps
1
Enter a website URL
Type the full URL you want to audit, for example https://example.com.
2
Run the speed test
We load the page and run a Lighthouse-style performance audit against it.
3
Review the metrics
Check Core Web Vitals (LCP, CLS, and more) and your overall performance score.
4
Apply the recommendations
Work through the prioritised opportunities — images, scripts, caching — to speed the page up.

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Frequently asked questions

Common questions about website speed and Core Web Vitals
5 Q&A

They are Google's user-focused performance metrics: LCP (loading), INP/CLS (interactivity and visual stability). Google uses them as a ranking signal, so passing them helps both users and SEO.

A Lighthouse performance score of 90+ is considered good, 50–89 needs improvement, and below 50 is poor. The score is a weighted summary of the underlying metrics.

Front-end factors often dominate: large unoptimised images, render-blocking JavaScript and CSS, too many third-party scripts, and missing caching. The recommendations pinpoint which of these apply.

It's a lab test from our servers under controlled conditions, which is great for diagnosing and comparing. Real-user (field) data can vary by device and network, but lab results reliably surface the fixable problems.

Test after any significant change — a redesign, new scripts, a plugin, or a hosting move — and periodically as a baseline, since performance tends to regress over time as pages accumulate weight.