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Connection Stability Test
Is your WiFi dropping or lagging now and then? This test watches your connection for about half a minute, draws a graph and counts the lag spikes. Free, no signup, very little data.
What your stability is good for
Stay in the spot where you have the problem and keep the page open until it finishes.
When to run this test
- Video calls freeze or the voice breaks up for a second.
- Online games jump or "rubber-band" even though your speed is fine.
- Your WiFi feels fine, then suddenly stalls.
- Pages sometimes hang for a few seconds and then load.
These problems usually come from an unsteady connection, not a slow one. A normal speed test can look perfect and miss them completely.
How to read the graph
- A flat, low line means a steady connection.
- Sharp peaks are lag spikes. Each one is a moment where your data was delayed.
- A line that slowly climbs can mean something is using your network, such as a download or backup.
- Jitter is the average change between samples. Under about 10 ms is steady.
One or two spikes in a full run are normal, especially on Wi-Fi. A run with many spikes tells you the problem is real.
Find the cause in three runs
- Run the test next to your router. Note the lag spikes.
- Run it again in the room where you have trouble.
- If you can, connect a cable and run it a third time.
Steady next to the router but spiky in your room means weak signal. Steady on cable but spiky on Wi-Fi means a Wi-Fi problem. Spiky everywhere means the issue is with your provider or router. For a single quick reading, use our ping test, and for your download and upload speed use the internet speed test.
How to make your connection steadier
- Use a cable for work calls and gaming when possible.
- Move the router to a central, open spot, away from walls and metal.
- Use the 5 GHz band for devices close to the router.
- Pause downloads, cloud backups and streaming while you test.
- Restart your router and run the test again.
- If spikes continue at all times of day, contact your provider with your test results.
Frequently asked questions
How is this different from a ping test?
A ping test takes a quick snapshot. This test watches your ping over a longer run and counts the moments it jumps. A connection can show a good ping in a short test and still freeze now and then, which is what this test is built to catch.
What counts as a lag spike?
A sample is counted as a spike when its ping is far above your normal ping, at least double the typical value and more than 40 ms higher. A few spikes are normal on Wi-Fi. Many spikes in one run point to interference or a busy network.
Why does my WiFi connection keep spiking?
The usual causes are weak signal, walls and distance, interference from other networks, many devices using the router, or downloads running in the background. Testing next to the router and then in your usual spot helps you find the cause.
What if the test stops in the middle?
If your connection drops completely, the test may stop with an error message. That itself is useful information. Run the test again, note when it happens and tell your provider if it keeps repeating.
How long does the test take and how much data does it use?
It takes roughly half a minute, depending on your ping. It sends many tiny requests, so it uses very little data compared with a speed test, which makes it safe to run on mobile data.
Can this test find the exact cause of my problem?
It shows whether your connection is steady, not why. Compare a Wi-Fi run with a cable run. If the cable run is steady and Wi-Fi is not, the problem is your Wi-Fi. If both spike, contact your internet provider.