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Internet diagnostic tool

WiFi packet loss test

Detect whether wireless instability is causing packet loss, lag spikes, bad calls, or buffering. Compare results over WiFi and Ethernet to see whether the router or internet line is the problem.

Ready to test

Test if your internet is actually good enough

Run a quick browser-based diagnostic for calls, gaming, streaming, VPN, and remote work. Verdicts appear before raw technical numbers.

MVP note: latency, jitter, packet loss, and speed are browser-based estimates. Fetch failures/timeouts approximate packet loss and may be affected by blockers, CORS, or third-party test endpoints.

No result yet. Tap “Run internet test” to generate readiness scores.

WiFi packet loss test: what the results mean

Detect whether wireless instability is causing packet loss, lag spikes, bad calls, or buffering. Compare results over WiFi and Ethernet to see whether the router or internet line is the problem.

Common WiFi packet loss causes

  • Weak signal through walls or floors.
  • Interference from neighboring networks.
  • Crowded 2.4 GHz channels.
  • Router CPU overload or outdated firmware.

Fix WiFi packet loss

  • Move closer to the router or use mesh backhaul.
  • Switch to 5 GHz or 6 GHz when possible.
  • Try Ethernet for calls and gaming.
  • Reboot or update the router firmware.

Frequently asked questions

Can WiFi cause packet loss?

Yes. Distance, interference, crowded channels, weak signal, and old routers can all cause packet loss even when your internet plan is fast.

How do I know if packet loss is WiFi or ISP?

Run the test on WiFi, then run it again over Ethernet. If Ethernet improves results, WiFi is likely the bottleneck.

Is 1% packet loss bad?

For gaming and calls, even 1% packet loss can be noticeable. For browsing, it may be less obvious.

Recommended next steps

Fix the connection, not just the score

Disclosure: NetCheckPro may earn a commission from partner links. Recommendations should be chosen based on your own needs and test results.

Router / mesh WiFiInternal guide

WiFi causing packet loss?

If Ethernet is better than WiFi, a stronger router or mesh setup may help.