Internet SpeedLIVE
Measures your real download & upload bandwidth, plus latency and jitter, by streaming sample files to/from Cloudflare's public speed endpoints. The test starts automatically — just sit and watch.
Live Readingstarting…
↓ Download
0.00 Mbps
↑ Upload
0.00 Mbps
Results—
Download—
Upload—
Latency—
Jitter—
Download samples—
Upload samples—
Connection—
RTT (NIC)—
How it works
The whole run is time-bounded to ~10 seconds regardless of how fast your connection is. Latency / jitter — four quick pings; we drop the first (warm-up) and take the mean / standard deviation. Download — streams from speed.cloudflare.com/__down for 4.5 s, abort, then computes the steady-state throughput (slow-start ramp is excluded). Upload — POSTs random bytes to speed.cloudflare.com/__up for 4.5 s. Browser-based numbers are typically within ±15% of a native speed-test client.