Connection test

Latency here is the round trip from your browser to this site's server, wherever that sits; it says little about a game server or a video call to somewhere else. Jitter is the mean swing between consecutive probes, and it matters more than the median for calls: a steady 60 ms beats a jumpy 30 ms. The measured numbers come from timed fetches this tab performs; the browser's own connection type, downlink, and round-trip estimates come from the Network Information API, which Chromium exposes and most others do not, so those fields are marked Not reported rather than estimated. Nothing here measures throughput, and no probe is fired until you press the button.