White Noise - Free Online | FunToolX
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White Noise
Full spectrum, classic masking noise
⚡ Web Audio API real-time synthesis, zero files
About this tool
White Noise is a free online ambient sound player. Full spectrum white noise, classic background masking for sleep and focus. Perfect for focusing, sleeping, or relaxing. It runs entirely in your browser — no download or sign-up needed.
The white noise generator produces a random signal that contains all frequencies within the audible range of the human ear, with each frequency having equal energy. It sounds like the rustling sound of a TV when there is no signal or the static noise of a radio. The volume can be adjusted and regular shutdown is supported.
White noise helps block out sudden noises in the environment because its persistence and uniformity can cause the brain to ignore it while obscuring other sounds. It is often used in scenarios such as sleeping assistance, improving concentration, relieving tinnitus, and soothing babies.
Use ScriptProcessorNode or AudioWorklet of the Web Audio API to generate random audio samples in real time. The generation algorithm ensures that each sample is an independent random value, producing true white noise characteristics. This tool runs completely on the browser side and does not require downloading any audio files.
White noise generator generates random noise signals including all frequencies, which are used to block environmental noise, help sleep, and improve concentration.