⚡HTTP/2 vs HTTP/1.1
Detect the protocol your connection negotiates, then race the two head-to-head — if HTTP/2 loses, a proxy is likely downgrading you.
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Checking connection protocol…
🖥 Client-Side Detection
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🗄 Server-Side Detection
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⏱ This Page's Connection Timing
Reading navigation timing…
📊 HTTP/1.1 vs HTTP/2 Feature Comparison
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🏁 Load Race — HTTP/1.1 vs HTTP/2
500 requests per leg of a tiny ~1.6 KB tile — small on purpose, so the race is latency-bound (where HTTP/2 wins) · HTTP/1.1 leg from
h1.nettest.dolbow.net (a real HTTP/1.1 endpoint, ~6 connections) · HTTP/2 multiplexes over 1 connection
HTTP/1.1
real HTTP/1.1 endpoint · browser's ~6-connection limit
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HTTP/2
1 connection · all requests multiplexed
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📡 Connection Waterfall Test
Fires 24 requests simultaneously — shows DNS/TCP/TLS reuse across requests