Jitter

What jitter means

Jitter is the variation in the time it takes for data packets to travel from your device to a server. In a perfect network, every packet takes the same amount of time. In reality, packets can take slightly different paths through the network and arrive at different intervals. That inconsistency is called jitter, and it is measured in milliseconds.

Think of jitter like water flowing through a hose. If the flow is steady and consistent, you have low jitter. If the flow pulses and fluctuates, you have high jitter. Low jitter means a smooth, predictable connection. High jitter means data arrives in bursts rather than a steady stream.

Jitter is particularly damaging for real-time applications. When you are on a video call, your device needs to receive audio and video frames at a consistent rate. If packets arrive in an uneven pattern due to high jitter, the call software cannot reassemble them quickly enough, and you hear choppy audio or see frozen video. See also: latency and ping.

Why jitter matters for your connection

For most web browsing and streaming, some jitter is not noticeable because your device can buffer a small amount of data ahead of time. But for real-time applications where buffering is not an option, like video calls, online gaming, and VoIP phone calls, jitter directly affects quality.

In gaming, high jitter causes inconsistent lag. A player might seem to be in one position when they are actually somewhere else. This is separate from high ping, which adds a constant delay. Jitter adds unpredictable delay, which is often worse than constant delay.

Jitter at a glance

Common questions about jitter

Related terms

Learn more

• Jitter Explained
• Ping and Latency Explained