White & Pink Noise Generator
Continuous white, pink, or brown noise with a sleep timer — generated locally, loop-free memory leaks.
Ready
ReadyTimer
Turn your system volume down first
Start at a low volume, especially with headphones and low bass tones, then raise it slowly.
Burn-in note: pink noise at moderate volume is a common practice for new headphones, but benefits vary and are not guaranteed — avoid loud, long sessions.
This tool runs locally in your browser — no audio is uploaded.
How to use
- 1
Pick a color
White noise is bright and hissy (equal energy per hertz), pink is balanced and softer (equal energy per octave), brown is a deep rumble. Start with the volume low, around 30%.
- 2
Set the timer if you like
Choose 15, 30, 60, or 120 minutes and the sound stops by itself — handy for sleep. Without a timer it plays until you stop it.
- 3
Adjust to taste
For focus or sleep many people prefer pink or brown at low volume. For speaker burn-in, pink noise at moderate volume is the usual choice.
How it works & limits
All three colors are synthesized locally with the Web Audio API: white from uniform random samples, pink via the Paul Kellet filter, and brown by integrating white noise. A looping buffer keeps CPU use flat, so the noise can run for hours without glitches or memory growth.
A honest note on burn-in: playing pink noise to loosen driver suspension is a common practice, but its effect on sound quality is debated and varies by model — nothing on this site promises improved sound. For masking noise, equal-energy-per-octave pink usually feels most natural, while white masks sharp sounds like clicks best.
FAQ
What is the difference between white, pink, and brown noise?
White: every frequency equally strong — bright hiss. Pink: equal energy per octave — warmer, like steady rain. Brown (red): energy falling steeply with frequency — deep waterfall rumble.
Is noise good for sleep or focus?
Many people use it to mask traffic or office noise; pink and brown are popular for sleep. Effects differ between people — use the timer and a comfortable volume, and keep it quiet enough to hear alarms.
How loud should burn-in noise be?
If you try burn-in at all, keep it moderate — noticeably below listening volume — for a few hours. There is no guaranteed benefit, and loud levels risk damage instead.
Why does the volume slider default so low?
Noise has energy at every frequency at once; it gets tiring and masks your surroundings faster than a tone. Start low and raise slowly.
Will the timer keep running if I close the tab?
No — the noise and timer live in this tab only. Closing the page stops everything immediately; nothing plays in the background.
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