Browser ⇄ server datagram probe (WebTransport)
Server URL
Mode
up (browser → server, JS CC)
down (server → browser, server CC)
both
Duration (s)
Datagram size (bytes)
Browser QUIC CC hint
default
throughput
low-latency
Up CC (browser)
fixed
aimd
Up CC params (JSON)
{"rate_mbps": 2}
Down CC (server)
fixed
aimd
Down CC params (JSON)
{"rate_mbps": 2}
outgoingMaxAge (ms, 0 = default)
outgoingHighWaterMark (datagrams)
Run
Download JSON