How to Check Website Speed for Free

Why Website Speed Matters

Page speed directly affects user experience, bounce rates, and search engine rankings. Google uses Core Web Vitals as ranking signals, and studies show that a one-second delay in load time can reduce conversions by up to 7%. Speed is not optional - it is a competitive advantage.

Yet many website owners never measure their actual load times. They rely on their own fast internet connection and assume the experience is the same for everyone. A proper speed test reveals the truth from a real-world perspective.

Key Metrics That Matter

Largest Contentful Paint (LCP)

LCP measures how long it takes for the largest visible element - usually a hero image or heading - to finish loading. Google considers anything under 2.5 seconds as good. Between 2.5 and 4 seconds needs improvement, and above 4 seconds is poor.

Cumulative Layout Shift (CLS)

Have you ever tried to click a button only for the page to shift and you tap something else? That is layout shift. CLS measures visual stability. A score below 0.1 is good, between 0.1 and 0.25 needs work, and above 0.25 is poor. Common culprits include images without dimensions, dynamic ads, and late-loading fonts.

Total Blocking Time (TBT)

TBT measures how long the main thread is blocked by JavaScript during page load. Under 200ms is good, 200-600ms needs improvement, and over 600ms is poor. Heavy third-party scripts are often the main offender.

Common Speed Killers

Unoptimized Images

Images often account for over half of a page's total weight. Using modern formats like WebP or AVIF, proper compression, and responsive srcset attributes can cut image size by 50-80% without visible quality loss.

Too Many Third-Party Scripts

Analytics, chat widgets, social media embeds, and ad networks each add HTTP requests and JavaScript that block rendering. Website Grader flags pages with more than 10 third-party scripts - a threshold where performance typically degrades.

Missing Compression

Gzip or Brotli compression can reduce HTML, CSS, and JavaScript file sizes by 60-80%. Yet surprisingly many sites still serve uncompressed resources. This is one of the easiest wins for speed improvement.

How Website Grader Tests Speed

When you scan a URL, Website Grader uses the Google PageSpeed Insights API to measure real Lighthouse performance data. You get actual LCP, CLS, and TBT numbers - not estimates - along with a performance score from 0 to 100.

The tool also checks page weight, number of external resources, HTML size, and compression status. Each check returns pass, warning, or fail, so you know exactly what to prioritize.

Quick Wins to Speed Up Your Site

Start with these high-impact changes: enable Brotli or Gzip compression on your server, convert images to WebP, lazy-load below-the-fold images, minimize third-party scripts, and set proper cache headers. These five changes alone can improve your LCP by 30-50% on most sites.

Test Your Speed Now

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