Browser-based utility
Check whether a website responds.
Enter a URL to check the response from your browser. The tool also looks up the hostname using Cloudflare's public DNS service. You can see timing and any response details the website allows your browser to read.
Your result
The result will include the check time, response timing, DNS resolution, and any details the browser is allowed to inspect.
Response time
HTTP status
Public DNS lookup
Checked URL:
Checked at:
What this check means
A response with a visible status means the site permits browser-based inspection. A limited result means the browser completed a request but the site’s cross-origin policy hid the status and page details. Public DNS resolution means Cloudflare’s resolver found an address; it does not prove that the web server accepts connections.
Why status details may be hidden
Websites control which other sites may read their responses. That browser security boundary is called cross-origin policy.
Timing is local
The timing includes this browser, network, connection, redirects, and the site’s response. It is not a universal server-speed measurement.
Use a monitoring service for certainty
A one-time browser check cannot monitor a site, inspect DNS or certificates, or prove that every visitor can connect.
Assumptions and limits
This prototype makes requests from your browser and does not send your URL to our server or store the result. The optional DNS check sends the hostname to Cloudflare’s public DNS resolver. Results can differ by network, browser, location, redirects, firewalls, maintenance pages, and site security settings. Treat an unreachable result as a prompt to investigate—not proof that a website is down.
Prototype method reviewed October 6, 2026.
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