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iperf3 Client

Measure TCP throughput against a reachable iperf3 server.

📊

iperf3 Client

iperf3

Input

  • Target: iperf3 server host or IP address.

Options

  • Port: TCP port the server is listening on (default 5201).
  • Duration: test length in seconds, from 1 to 60 (default 10).
  • Direction: upload (client → server) or download (server → client).

Output

  • Per-second throughput rows that update live during the test.
  • Sender and receiver summary (throughput, transfer size, elapsed time).

Notes

  • TCP only, single stream.
  • Requires a reachable iperf3 server — start one on a LAN host with iperf3 -s.
  • The server accepts one client at a time. If access is denied, another client is likely connected.
  • Throughput can vary by device performance, Wi-Fi quality, route, and server load.

Deeplink

netdebug://iperf3?target=10.0.0.1&port=5201&duration=20&direction=download

Tip: in the app, open the Export menu (the share icon) on this screen and choose Copy Deeplink to copy this link as a Universal Link with your current target and options already filled in.