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Bandwidth

How much capacity is left on the network you are on right now. Full test uses the official Cloudflare speedtest engine. Live monitor runs 15 seconds of download, upload, and ping, then stops on its own. When other devices hog the line, available speed drops.

Download

-Mbps

idle

Upload

-Mbps

idle

Latency

-ms

jitter -

Available now

-Mbps

idle

Throughput over time

Ready

Press Run speed test for a full measurement, or Live monitor for a 15 second sample that then stops.

This connection

Network type: -
Browser estimate: -
RTT (browser): -
Save-Data: -
Cloudflare colo: -
Client IP (edge): -

Recent tests

No tests yet in this browser.

What this can and cannot see

Can: full test uses the official Cloudflare speedtest engine (same ramp as speed.cloudflare.com). Live monitor is a 15 second sample: 6 download streams, upload samples, and a ping every second. It stops on its own. Congestion from other phones, TVs, and downloads shows up as lower Mbps and higher ping.
Cannot: list other devices on your Wi-Fi or show per-device usage from a website. Browsers are sandboxed; they cannot sniff LAN traffic.
For device discovery on this Mac: run local ~/wifiwatch (python3 wifiwatch.py watch). Real per-device bandwidth needs the router (Ubiquiti, Firewalla, ASUS) or a forced DNS path (NextDNS / Pi-hole).