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WebTransport Testing

Route: /webtransport

Experiment with WebTransport, a modern transport protocol built on HTTP/3 and QUIC that supports low-latency streams and unreliable datagrams.

note

WebTransport is reachable directly at /webtransport. It relies on the browser's native WebTransport API, which is available in recent Chromium-based browsers and may not be supported everywhere.

Features​

  • Connect to a WebTransport endpoint and manage the session.
  • Streams and datagrams — send and receive both message types.
  • Connection statistics — streams created, datagrams sent/received, RTT, bandwidth usage, packet loss, congestion window, and active streams.
  • Message log distinguishing stream, datagram, system, and error messages.

How it works​

The session is established directly from your browser via the native WebTransport API. Your server must speak HTTP/3 and present a valid certificate that the browser accepts.

Using it​

  1. Open /webtransport.
  2. Enter the URL of a WebTransport server.
  3. Connect and choose whether to exchange streams or datagrams.
  4. Watch the live statistics and message log update.
  • WebSockets — widely supported bidirectional alternative.