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Category Network Utilities

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Duration Interval

Jitter (Avg)

ms deviation

Latency (Avg)

ms rtt

Packet Loss

% failed

Quality (MOS)

/ 5.0 score

P99 Spike: -- ms Std Dev (σ): -- ms Est. Buffer: -- ms Stability: -- %

Real-Time Heartbeat Latency Spikes

Download the full dataset including timestamps, raw latency, and calculation deltas.

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About

Network stability is the silent killer of real-time applications. While bandwidth speed tests measure how wide the pipe is, a Jitter Test measures how smooth the flow is. Jitter is the variance in time delay between data packets (inter-arrival time). In high-performance environments like algorithmic trading, competitive eSports, or telemedicine, low latency is irrelevant if the variance is high.

This tool utilizes the RFC 3550 logic to calculate inter-arrival jitter and the ITU-T G.107 E-model to estimate Voice Quality (MOS). It goes beyond simple averages by calculating Standard Deviation and P99 percentiles. These metrics reveal micro-stutters that standard tests miss. The integrated database compares your connection stability against the strict requirements of over 100 distinct digital services.

Formulas

This tool employs statistical analysis to determine connection stability. The primary calculations conform to real-time transport protocols.

Smoothed Jitter (RFC 3550):

J_i = J_i-1 + |D_i − J_i-1|16
Where D_i is the difference in arrival times.

Standard Deviation (Variance):

σ = √N∑i=1(x_i − x)²N − 1

Effective Latency (E-Model):

L_eff = L + 2 × J + 10

Reference Data

Metric	Symbol	Definition	Target (High Perf)	Target (Standard)
Latency	L	Time for a packet to travel round-trip.	< 20 ms	< 100 ms
Jitter	J	Variation in packet arrival time.	< 2 ms	< 30 ms
Packet Loss	PL	Percentage of data that never arrives.	0.00%	< 1.0%
Standard Deviation	σ	Dispersion of latency values from the mean.	< 5 ms	< 15 ms
MOS Score	MOS	Mean Opinion Score (Voice Quality).	> 4.4	> 4.0
99th Percentile	P₉₉	Worst 1% of latency spikes.	< 50 ms	< 200 ms

Frequently Asked Questions

Ping (Latency) is the time it takes for a signal to travel to a server and back. Jitter is the variance or fluctuation in that time. If your ping is 50ms, then 52ms, then 48ms, you have low jitter (good). If it jumps 50ms, 150ms, 50ms, you have high jitter (bad), which causes lag spikes and stuttering.

You may be experiencing "Late Packets". If a packet arrives too late to be useful (e.g., in a live video call), the application discards it, but technically it wasn't lost by the network. Check your P99 metric; if it is significantly higher than your average latency, you have micro-stutters.

For competitive gaming (FPS), jitter should be below 4ms. For VoIP (Zoom/Teams), jitter below 30ms is acceptable. Anything above 50ms will cause noticeable audio roboticism or "talk-over" issues.

1. Switch from Wi-Fi to Ethernet (cable). 2. Enable QoS (Quality of Service) on your router to prioritize gaming/VoIP traffic. 3. Check for "Bufferbloat" by limiting your max download speed to 90% of what your ISP provides. 4. Replace outdated router hardware.

Browsers restrict access to raw ICMP (Ping). This tool uses high-frequency TCP/HTTP requests (Fetch API) with cache-busting headers to simulate application-layer latency. This is often more accurate for testing real-world app performance (like web browsing or loading game assets) than a raw ICMP ping.