Network Diagnostics
The network test that shows what Speedtest hides
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Network Diagnostics - The network test that shows what Speedtest hides

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NetworkTests.com goes beyond traditional speed tests. Tools like Speedtest rely on TCP, which retransmits lost packets and can hide network issues. NetworkTests.com uses WebRTC UDP to measure real packet loss, latency, and jitter experienced by video calls, gaming, and VoIP. It also performs hop-by-hop path diagnostics from server to your connection edge. Includes tools like IP lookup, DNS lookup/trace, traceroute, ping, MTR, VPN detection, DNS leak test, and SSL proxy check.

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I built NetworkTests.com because I kept seeing great Speedtest scores while my video calls were still choppy and games were lagging. The reason turned out to be packet loss — and Speedtest simply can't see it because TCP retransmits lost packets automatically. NetworkTests.com uses WebRTC DataChannels in unreliable/unordered UDP mode — the same way real-time apps behave — so packet loss, jitter, and latency are measured as your applications actually experience them. The part I'm most proud of is the hop-by-hop path diagnostics — it runs inbound MTR from our servers through NAT to your connection edge, entirely from a browser session with no install required. I haven't seen other browser-based tools do this. Beyond the core test, the site includes 12 diagnostic tools: IP lookup, DNS lookup, DNS trace, traceroute, MTR, ping, AS lookup, reverse DNS, MAC lookup, VPN detection, DNS leak test, and SSL proxy / TLS interception check. Everything is free, no signup required. Happy to answer any technical questions about how it works. Feedback very welcome!