Website Speed Test

Check load time, TTFB, DNS, connect time, and performance rating for any URL

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Frequently Asked Questions

TTFB (Time to First Byte) is the time from when a client sends an HTTP request to when it receives the first byte of the response. It includes DNS lookup, TCP connection, TLS handshake, server processing, and the start of the response transfer. A good TTFB is under 200ms. TTFB is one of the most important indicators of server performance and is used as a Core Web Vital signal by Google.

Google recommends a total load time under 2.5 seconds (LCP). For server response (TTFB), under 200ms is excellent. For most websites: under 500ms total is excellent, 500ms–1.5s is good, 1.5s–3s is average, 3s–5s is slow, and over 5s is very slow. Faster pages have lower bounce rates and better SEO rankings.

DNS lookup time is how long it takes to resolve the domain name to an IP address. This usually takes 10–100ms. A slow DNS (over 200ms) can be improved by switching to a faster DNS provider (e.g. Cloudflare 1.1.1.1, Google 8.8.8.8) or using DNS caching / CDN services.

This tool measures server-side TTFB and response time using a direct HTTP request — it does not render JavaScript, CSS, or images. Tools like GTmetrix and Google PageSpeed Insights measure full browser rendering (including all assets). Use this tool to check raw server performance and TTFB, and browser-based tools for full page render metrics.

Key improvements: use a CDN (Cloudflare, BunnyCDN), upgrade your hosting plan, enable gzip/brotli compression, use HTTP/2 or HTTP/3, enable server-side caching, reduce TTFB by optimising database queries, minimise redirect chains, and keep your DNS TTL low. For front-end speed, minify JS/CSS, optimise images, and use lazy loading.

About Website Speed Test

What This Tool Measures

This tool sends a real HTTP request from the server to your target URL and measures DNS resolution time, TCP connection time, SSL handshake time, TTFB, total response time, and response size. Results reflect raw server performance, not browser rendering time.

Common Use Cases
  • Check if a website is slow or fast
  • Diagnose high TTFB on your own server
  • Compare hosting providers
  • Monitor uptime and response times
  • Verify CDN or caching is working