Free White, Pink & Brown Noise Generator
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About the Noise Generator
Generate white, pink or brown noise for focus, sleep or masking distractions — control volume and visualise the waveform, all powered by Web Audio API in your browser.
How to use the Noise Generator
- 1Choose white, pink or brown noise from the noise type selector.
- 2Adjust the volume slider to set the output level.
- 3Click Play to start the noise — the waveform bar animates while playing.
- 4Click Stop whenever you want to pause the noise.
Frequently asked questions
What is the difference between white, pink and brown noise?
White noise has equal energy at all frequencies — it sounds like TV static. Pink noise emphasises lower frequencies equally per octave, resembling rain or a fan. Brown noise (Brownian noise) boosts bass even more, sounding like ocean waves or thunder.
Which noise type is best for sleep?
Pink and brown noise are generally preferred for sleep because they mask environmental sounds while having less harsh high frequencies than white noise. Brown noise is particularly popular for deep focus and sleep.
Does this use my microphone?
No — noise is generated mathematically by the Web Audio API. No microphone access is requested.
Is this tool client-side only?
Yes — all audio is generated in your browser using the Web Audio API. Nothing is sent to a server.