Website Speed Test
Find out whether a slow page is caused by the server, by redirects or by a heavy HTML document, and what to fix first.
Inspect server response speed of a URL
Each run is split into redirect time, server response and download, and the median time to first byte is rated against Google’s 0.8 s and 1.8 s thresholds, along with compression, caching headers and render-blocking scripts.
Interpret the result
Fix the largest slice first: cache HTML at a CDN when the server is slow, link straight to final URLs when redirects add time, and enable compression for large documents.
Prioritize fixes
Timings are taken from a data center, not from your visitors’ devices or networks, and cover only the HTML document; use the Core Web Vitals Checker for rendering and real-user data.
How to interpret server response speed of a URL
Each run is split into redirect time, server response and download, and the median time to first byte is rated against Google’s 0.8 s and 1.8 s thresholds, along with compression, caching headers and render-blocking scripts.
Limits of this check
Timings are taken from a data center, not from your visitors’ devices or networks, and cover only the HTML document; use the Core Web Vitals Checker for rendering and real-user data.
Frequently asked questions
What does this tool check?
Each run is split into redirect time, server response and download, and the median time to first byte is rated against Google’s 0.8 s and 1.8 s thresholds, along with compression, caching headers and render-blocking scripts.
How should I use the result?
Fix the largest slice first: cache HTML at a CDN when the server is slow, link straight to final URLs when redirects add time, and enable compression for large documents.
What are the limits?
Timings are taken from a data center, not from your visitors’ devices or networks, and cover only the HTML document; use the Core Web Vitals Checker for rendering and real-user data.
Related URL tools and guides
Core Web Vitals Checker
Check a page's Core Web Vitals from real Chrome users plus a Lighthouse lab test, on mobile or desktop.
Learn moreCache-Control Header Checker
Parse Cache-Control directives and inspect CDN, validator and freshness response headers.
Learn moreURL Redirect Checker
Trace 301, 302, meta refresh and JavaScript redirects across multiple user agents.
Learn more