Packet Loss Test

Run a simple packet loss test, understand dropped packets and check whether Wi-Fi, upload congestion or your broadband line could be causing lag.

Connection stability test

Check whether dropped packets are making your broadband feel unstable

A packet loss test is useful when games lag, video calls freeze, voice chat cuts out or remote work tools reconnect even though your download speed looks fine.

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Packet loss test illustration showing dropped packets, ping, jitter and router checks

Browser check

Run a simple packet loss test

This browser test sends repeated small requests and records failed, timed-out or very slow responses. It is an estimate, but it helps spot obvious instability before testing with Ethernet or contacting your provider.

Tip: run this once on Wi-Fi where the problem happens, then repeat beside the router or over Ethernet.

Ready to testPacket loss: —Press start to send 30 small test requests.

What packet loss means

Packet loss happens when small pieces of internet traffic fail to reach their destination or fail to return in time. It is most noticeable in online games, video calls, voice chat, livestreams and remote desktop tools.

Common causes of packet loss

Weak Wi-Fi

Distance, thick walls, interference and overloaded channels can drop or delay packets.

Upload saturation

Cloud backups, CCTV, file uploads or livestreams can fill the upstream and make everything stutter.

Line or router faults

Old routers, bad cables, powerline adapters, congestion or local faults can create unstable traffic.

How to reduce packet loss

  1. Repeat the test over Ethernet or beside the router.
  2. Pause uploads, cloud backups and large downloads.
  3. Restart the router and check cables, switches and powerline adapters.
  4. Compare daytime and evening results to spot congestion.
  5. If packet loss remains on Ethernet, save results and contact your provider.
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Packet loss test FAQs

What is a packet loss test?

A packet loss test checks whether small pieces of data fail to complete a round trip. In a browser, the result is an estimate because browsers cannot run the same low-level network tests as command-line tools.

Is packet loss bad for gaming?

Yes. Even a small amount can cause lag, rubber-banding, missed inputs and voice chat dropouts.

How do I reduce packet loss?

Use Ethernet, pause uploads, improve Wi‑Fi signal, restart the router and test at different times of day.