Connection Health Monitor

idle —

RTT

— ms

last ping

Download

— Mbps

last test

Connection

—

browser estimate

RTT (ms) over time

Download speed (Mbps) over time

Stats

RTT

—

min / median / p95 / max

Download

—

min / median / p95 / max

Counts

—

pings / fails / speed runs

Settings

ping every s speed test every s (0 = manual) size

endpoint Cloudflare's speed-test endpoint is CORS-friendly and globally distributed.

Event log

RTT measures the time to fetch a 0-byte response from the endpoint. Speed test downloads N bytes once and divides. Background tabs are throttled by browsers — measurements pause when this tab isn't focused.