Server Response Time Test

About Server Response Time Test

How fast a website's server responds is a foundational piece of overall page speed — before a browser can even start rendering a page, it has to resolve the domain's DNS, open a connection, complete a TLS handshake for HTTPS, and wait for the first byte of the response. Slow performance at this layer affects every visitor, regardless of their device or how well-optimized the page's own assets are.

This tool measures each of those steps individually for the main HTML document: DNS lookup time, TCP connection time, TLS handshake time (for HTTPS sites), time to first byte (TTFB — how long until the server starts sending data), and total response time. Breaking the timing down this way pinpoints exactly where time is being spent, rather than just reporting one combined number.

This is a server response timing test, not a full page-load or Lighthouse-style test — it doesn't load images, stylesheets, JavaScript, or render the page like a real browser would. For that level of analysis (render timing, Core Web Vitals, resource waterfalls), a dedicated tool like Google PageSpeed Insights or Lighthouse is the right choice. What this tool measures well is the server-side foundation those tools build on top of.

This is useful for diagnosing whether slow-loading pages are a server problem or a front-end problem, checking hosting performance before and after a server migration, comparing response times across different hosting providers or CDN configurations, and quick server health checks.

How it works

1. Enter a website URL. Any public website address.
2. Click Run test. DNS, connection, TLS, and response timing are all measured from our server.
3. Review the breakdown. See exactly which stage of the connection is taking the most time.