Speed Tests
Jitter Test
Measure how stable your network latency is over time. High jitter causes choppy voice calls, video stutters, and lag spikes in gaming — even when your average ping looks fine.
Live latency waveform
Latency (ms)
Jitter delta (ms)
80
60
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0
Click Start Test to see your waveform
0s
5s
10s
15s
20s
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Avg jitter
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Max jitter
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Avg ping
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Min ping
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Packet loss
Sample history
Sample results will appear here as pings complete
Scored using our published, open-source methodology. View methodology
Jitter quality guide — what your result means
< 10ms
Smooth
Excellent for everything
Voice calls, video conferencing, and competitive gaming all feel perfectly stable at this jitter level.
10–20ms
Good
Good for most uses
Video calls stay clear. Casual gaming is fine. Competitive players may notice occasional input inconsistency.
20–50ms
Rough
Noticeable in calls
Voice calls start to break up. Video stutters. Gaming shows lag spikes. Check your Wi-Fi and router.
> 50ms
Poor
Calls drop, games lag
VoIP calls become unusable. Video disconnects. Gaming is severely impacted. Investigate router and ISP.
What causes high jitter
Wi-Fi interference
The most common cause. Neighbouring networks on the same channel, microwave ovens, and Bluetooth devices all cause packet retransmissions that spike jitter dramatically.
Overloaded router
A router with too many connected devices or an outdated CPU queues packets unevenly. This creates bursts of delay that show up as high jitter even when average ping is low.
Network congestion
ISP congestion during peak hours causes variable queuing delays. Packets waiting longer in the queue create jitter spikes that correlate with evening usage peaks.
VPN overhead variability
OpenVPN processing times are inconsistent under load, adding variable encryption delay. WireGuard is significantly more consistent due to its simpler kernel-level implementation.
Background processes
Active downloads, cloud sync, or video streaming competing for bandwidth cause variable packet delivery times — raising jitter without necessarily raising average ping.
Long network paths
More hops between you and the server means more chances for variable queueing delays. Geographically distant servers almost always show higher jitter than nearby ones.
Ping vs jitter — why you need both numbers
Ping (latency)
Average time for one round-trip
Measures raw speed of your connection
Low ping ≠ stable — can still have high jitter
Example: 22ms average ping
Jitter (variance)
Difference between consecutive ping values
Measures stability of your connection
High jitter causes choppy calls even at low ping
Example: jumps 18ms to 38ms and back