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Connection Information — Type, Speed Estimate & Latency

See what your browser reports about the network: connection type, downlink estimate and round-trip time.

Your browser exposes a coarse network estimate through the Network Information API: an effective type such as 4g, a downlink figure in Mbps and a round-trip estimate in milliseconds. These are buckets derived from recent traffic, not live measurements, and Safari and Firefox do not implement them at all.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why is this not a speed test?

Measuring throughput needs a server willing to send tens of megabytes, which would mean uploading and downloading real traffic through someone's infrastructure. This page measures what your browser already knows plus round-trip latency to this site — which is the honest limit of what a static page can tell you.

Why does effectiveType say 4g on my fibre connection?

"4g" is the top bucket the API defines; it means "at least as good as typical 4G", not that you are on a cellular network. There is no 5g or fibre value, so a gigabit line and a good mobile signal report identically.

How to use the connection & network information

  1. 1Turn "Measure latency to this site" on or off as needed.
  2. 2The result appears immediately — copy or download it.

Embed this tool

Put the working connection & network information on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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