Measure response time and packet loss to a host
Times HTTPS/HTTP round trips rather than classic ICMP — works on virtually any live website, including ones behind Cloudflare, since browsers can't send raw ICMP packets anyway.
Browsers and Cloudflare Workers can’t send ICMP packets, so this tool times HTTP(S) requests instead: it tries HTTPS first and falls back to plain HTTP. Because a web request includes setting up the connection and the server’s reply, the times are usually a little higher than a classic ICMP ping.
The requests start from the Cloudflare data centre nearest to you, so the result shows how quickly the target answers from your region — not from your own computer.
Lower is better. Inside the same country 10–40 ms is typical; Europe to the US east coast is around 80–120 ms. Times that jump around a lot, or requests that fail, point to an overloaded server or a congested path — run a traceroute to see where.
A device can be online and still not run a website on that address — a router, a firewall or a mail server, for example. This tool needs a web server to answer, so use the port scan to see which services the address does offer.