Free Website Performance Test
Measure page speed and find what's slowing it down
Test any URL for TTFB, compression, caching, CDN usage, render-blocking resources and image optimisation. Get a performance grade with actionable recommendations.
Results in ~10 seconds · Sign in to save history & set up monitoring
This tool uses the same scanner as the full SiteAuditLab audit — pre-filtered to this category. Run a full scan to see Security, Performance, SEO, Accessibility, Privacy & more together.
What gets checked
Frequently asked questions
Does this measure Core Web Vitals?
No, and it is worth being clear about the difference. Core Web Vitals — Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift — are field metrics, collected from real visitors over 28 days and published by Google in the Chrome User Experience Report. This scan is a synthetic lab test: one request from our servers, right now. It measures TTFB and load time directly, and it reports the page-level signals that tend to move those field metrics — render-blocking resources, image priority hints, missing dimensions that cause layout shift, compression and caching. For the field numbers themselves, use PageSpeed Insights or the Search Console Core Web Vitals report.
How do I improve my website speed?
The highest-impact improvements are: enable Brotli compression (saves 15–20% over gzip), add a CDN to reduce TTFB globally, set proper Cache-Control headers for static assets, remove render-blocking scripts with async/defer, and optimise images with WebP/AVIF and lazy loading.
What is TTFB and why does it matter?
Time to First Byte (TTFB) is how long the browser waits before receiving the first byte of page content. A high TTFB (>800ms) indicates server slowness, poor hosting, or lack of caching. It is not itself a Core Web Vital, but it is the floor for Largest Contentful Paint — LCP can never be faster than TTFB. A good TTFB is under 200ms.
Does this test from multiple locations?
Not yet — every scan runs from one region, so the TTFB you see is the TTFB from there. On a site behind a CDN that is usually representative; on a single-region origin it can look considerably better or worse than what your visitors get. Treat the number as one honest data point rather than a global average.
How often should I test performance?
After every significant deployment and at least weekly in production. Performance can degrade silently when adding new third-party scripts or after infrastructure changes. Use our scheduled audit feature to automate this.
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