Website Speed Checker
See how fast this page actually loaded, measured in your own browser with the Navigation Timing API — DNS lookup, connection, time to first byte, DOM load and full load. You can also time a request to any URL, and the result is always honest about what could and could not be measured.
Most websites block cross-origin requests (CORS), so a fetch to another site will usually be refused by the browser. That is normal — the result below will say so honestly instead of inventing a number.
This page's load time
Measured with the Navigation Timing API in your browser, for this page load only. Numbers vary between loads and connections.
URL test result
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How to use
- Open this page and read the load-time breakdown — it is measured automatically from your browser's Navigation Timing API.
- Click Re-measure this page to refresh the numbers for the current load, or reload the page for a fresh measurement.
- To time another site, paste its full URL (starting with https://) and click Test URL. If the site blocks the request, the result will explain why instead of showing a made-up time.
Frequently asked questions
What is TTFB?
Time to first byte is how long it takes from starting the request until the first byte of the response arrives. It reflects server response time plus network delay, and it is usually the biggest single chunk of a slow page load.
Why does the URL test fail for most sites?
Browsers enforce CORS (Cross-Origin Resource Sharing): a page may only read a response from another site if that site explicitly allows it. Most sites do not allow it, so the browser blocks the request before any timing can be read. The tool reports this honestly rather than guessing a load time.
Are these numbers real?
Yes. The page-load figures come from performance.getEntriesByType('navigation') in your own browser — the same API developer tools use. No numbers are invented, and if the API is unavailable the tool says so instead of showing a value.
Why do the numbers change between loads?
Network conditions, server load, cached resources and your device all vary. A cached second load is usually much faster than a first visit. Compare several loads, not a single measurement, when judging a page's speed. Use it as a website speed checker online — free, with no signup.
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