About OpenPacketLoss™ — Real UDP Testing

OpenPacketLoss™ is a free, browser-based network diagnostic tool built around one question: is your connection actually stable?

Bandwidth gets all the attention. But for video calls, online gaming, and VoIP, packet loss is what determines whether your experience is smooth or broken. Even 1-2% loss causes choppy audio, frozen video, and laggy gameplay, regardless of how fast your connection is.

Why existing tools fall short

Standard tools like ping and traceroute use ICMP, a protocol that routers routinely deprioritize or rate-limit. The results don't reflect what your real-time applications actually experience.

OpenPacketLoss™ tests over WebRTC using genuine UDP traffic, the same protocol stack used by Zoom, Google Meet, Discord, and every major online game engine. What you see is what your apps see.

No installs. No accounts. No nonsense.

Open the page, run the test. Works on desktop and mobile, directly in your browser. We don't collect personal data, only the network metrics you asked us to measure.

Run your own server

OpenPacketLoss™ is fully open source and available on GitHub. Whether you're a home user who wants more accurate local results, a sysadmin testing within your own infrastructure, or a developer who wants to self-host for your team, we have pre-built binaries ready to go. Just grab one for your platform and you're up and running. Visit the self-hosted server page to get started.

Built by the team behind OpenSpeedTest, available on GitHub and one of the world's most widely used internet speed tests.

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Test Your Connection Now

Experience the most accurate WebRTC-based UDP packet loss test directly in your browser. No software to install, no configuration needed. Head back to our homepage and start testing your network stability now.