🌊 White Noise Generator
Play white, pink or brown noise generated live in your browser, with a tone control and sleep timer that fades out. Free, no app, nothing to download.
Keep the volume moderate, especially with headphones or for babies — sound machines placed close to a crib can be louder than you expect. Keep this tab open; on phones, turn off auto-lock or the browser may pause audio.
What White Noise Generator Does
This white noise generator plays white, pink or brown noise, synthesized live by your browser rather than streamed from a recording, so there are no ads breaking in halfway through the night and it keeps working if the connection drops. The left and right channels are generated independently, which makes the sound feel wide and natural in headphones instead of sitting in the middle of your head.
A tone slider softens the sound by filtering out the highest frequencies, and a sleep timer from 15 minutes to 2 hours fades the noise out over its last 30 seconds so it does not stop abruptly. People use it to fall asleep, mask noisy neighbors or open-plan offices, settle babies, and focus while studying.
How to Use White Noise Generator
- Pick white, pink or brown noise
- Set a low volume and adjust the tone
- Choose a sleep timer or leave it off
- Press Play — the sound fades in gently
- Keep the tab open while it plays
Formula Used by White Noise Generator
Noise colors
Power per frequency ∝ 1 ÷ fᵃ, with a = 0 (white), 1 (pink), 2 (brown)
Worked example
Moving up one octave (doubling the frequency).
- White: same power, 0 dB change
- Pink: half the power per hertz, −3 dB
- Brown: a quarter of the power per hertz, −6 dB
Result: Pink and brown noise sound progressively deeper and softer than white noise.
Which Noise to Try
| Color | Sounds like | Often chosen for |
|---|---|---|
| White | TV static, a fan on high, a hiss | Masking voices and high-pitched sounds |
| Pink | Steady rain, rustling leaves | Sleep; a gentler all-round mask |
| Brown | Waterfall, distant surf, a low rumble | Sleep and focus; masking low traffic noise |
How to Read Your Result
Finding the right volume
Set it just loud enough to blur the sounds that bother you — usually softer than people expect. A quiet conversation is around 50–60 dB; masking noise does not need to be louder than the sound it covers. With headphones, keep the level low and take breaks.
For babies
Place any sound source well away from the crib, keep the volume low, and consider turning it off once the baby is asleep. Measurements of infant sound machines have shown that some can be surprisingly loud at close range and full volume.
Limitations & Accuracy Notes
- The browser tab must stay open; phones may pause audio when the screen locks or the browser moves to the background.
- While a sleep timer runs, volume changes take effect the next time you press Play.
- Noise masks sound but does not treat sleep disorders or tinnitus; ask a doctor about persistent sleep problems.