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How Site Speed Check Works

Our free tool uses Google Lighthouse to analyse your website's performance and deliver a detailed breakdown of speed metrics, Core Web Vitals, and prioritised recommendations for improvement.

1

Enter Your URL

Type or paste any publicly accessible website URL into the speed checker. It works with any site — whether it is built on WordPress, Shopify, a custom framework, or a static HTML page. No account or sign-up required.

2

We Request the Page and Measure Response Times

Our tool sends your URL to the Google PageSpeed Insights API, which runs a full Lighthouse performance audit. It simulates a real user loading your page on both mobile and desktop, measuring everything from initial server response through to full page render.

3

Analyse Performance Metrics

We break down your results into the metrics that matter most: First Contentful Paint, Largest Contentful Paint, Total Blocking Time, Cumulative Layout Shift, Speed Index, and Time to Interactive. Each metric is colour-coded so you can instantly see what is performing well and what needs attention.

4

Get Your Performance Grade and Recommendations

Your overall score is translated into a grade from A (excellent) to F (critical issues). Below the score, you will find prioritised opportunities and diagnostics — specific, actionable changes you can make to improve your page speed, sorted by potential impact.

What Gets Measured

Every speed test produces a comprehensive set of metrics. Here is what each one means and why it matters for your website's performance.

Time to First Byte (TTFB)

TTFB measures how long it takes for a browser to receive the first byte of data from your server after making a request. A slow TTFB usually points to server-side issues such as slow database queries, insufficient caching, or an overloaded host. Aim for under 200 milliseconds.

Full Load Time

This is the total time from the initial request to the page being fully interactive. It includes downloading all resources — HTML, CSS, JavaScript, images, fonts, and third-party scripts. A fully loaded page in under 3 seconds is considered good for most websites.

Page Size

The total weight of all resources downloaded to render your page. Smaller pages load faster, consume less bandwidth, and perform better on mobile networks. Images are typically the largest contributor to page size, making image optimisation one of the highest-impact improvements you can make.

HTTP Requests

Every file your page needs — each image, stylesheet, script, and font — requires a separate HTTP request. More requests mean more round trips between the browser and server, which slows down loading. Reducing the number of requests through bundling, lazy loading, and eliminating unnecessary resources can significantly improve performance.

SSL Handshake

Before any data is transferred over HTTPS, the browser and server perform an SSL/TLS handshake to establish a secure connection. This adds latency to every new connection. Modern protocols like TLS 1.3 and HTTP/2 reduce this overhead, but misconfigured SSL can still add hundreds of milliseconds to your load time.

Redirect Chain

When a URL redirects to another URL, which may redirect again, each hop adds a full round trip of latency. Redirect chains are common when migrating domains, switching to HTTPS, or using URL shorteners. Eliminating unnecessary redirects ensures users and search engines reach your content as quickly as possible.

Ready to test your site speed?

Run a free speed test right now and get your performance score with actionable recommendations.

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