Free white, pink, and brown noise generated live in your browser — no loop seams, no downloads, no signup. Set a sleep timer, tune the volume, and drift off.
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Renders the current sound fresh — use it as a ringtone or in your own videos.
Tip: browsers require a tap before any sound can play, so press Play once and the noise starts instantly. Keep the tab open while you sleep; on phones, leaving the screen on with low brightness works best.
100% private
Every sound is synthesized inside your browser with the Web Audio API. Nothing is uploaded, recorded, or tracked.
No signup
No account, no app install, no email. Open the page, press Play, and relax.
Free forever
All three noise colors, the sleep timer, and WAV export are free with no limits.
How to use the white noise generator
1Pick your sound
Choose white for a bright hiss, pink for a rainfall-like balance, or brown for a deep, low rumble. Switch anytime — the change is instant, even while playing.
2Press Play
Tap the big Play button once. Your browser needs that first tap to unlock audio; after that the sound starts immediately and runs seamlessly with no loop gaps.
3Set volume and sleep timer
Dial the volume to a comfortable level, then pick 15, 30, 60, or 90 minutes if you want the sound to fade out and stop after you fall asleep.
4Export a WAV if you need one
Choose a length and hit Download WAV to get a real audio file of the current sound — handy as a phone ringtone, alarm, or background track for videos.
Why this noise generator sounds better
Truly seamless sound
The noise is generated sample by sample as math, not played from a recording, and the loop point is crossfaded — so there is no click, gap, or repeating pattern to wake you up.
Three science-backed colors
White, pink, and brown noise each distribute sound energy differently. Pink noise resembles natural rainfall; brown noise emphasizes the low frequencies many sleepers prefer.
Sleep timer with countdown
Pick 15 to 90 minutes and watch the live countdown. The audio stops on its own, so it will not play all night and drain your battery.
Live visualizer
The animated bars show the real frequency content of what you are hearing, rendered from the actual audio signal — not a fake animation.
Real WAV export
Download 5 to 60 seconds of the current sound as a standard 16-bit WAV file that works in any editor, phone, or video project.
Works offline after loading
Once the page has loaded, everything runs locally in your browser. No streaming, no buffering, no data usage while you sleep.
White noise FAQs
Does white noise actually help you sleep?
For many people, yes. Constant background sound masks sudden noises — traffic, a barking dog, a creaking house — that would otherwise wake you. Studies on pink and white noise show improved sleep onset for light sleepers, though results vary person to person. Try pink or brown noise too; many find the deeper tones less harsh than white noise.
What is the difference between white, pink, and brown noise?
It is about how sound energy is spread across frequencies. White noise is equally loud at every frequency, which sounds like a bright hiss. Pink noise softens the high frequencies, sounding like steady rain or wind. Brown noise softens them even more, sounding like a deep rumble or distant waterfall. None is objectively better — pick whichever feels most comfortable.
Is the sound really seamless, or does it loop?
Both, in the best way: the audio is synthesized mathematically in real time rather than played from a recording, and the loop point is crossfaded over half a second. That means there is no audible click, gap, or repeating rhythm the way looped MP3s have. WAV exports are rendered fresh for the full length you choose.
Will it keep playing if my phone screen turns off?
It depends on your phone. Most Android phones keep web audio playing with the screen off as long as the browser tab stays open. iPhones may pause background tabs; keeping the page in the foreground with the screen dimmed is the most reliable option. Desktop browsers play indefinitely with the tab open.
Is it safe to listen all night?
Yes, at moderate volume. Hearing experts suggest keeping background sound well below conversation level — you should be able to hear someone speaking to you over it. If you wake with ringing ears or a headache, turn it down. The sleep timer is the easiest way to avoid all-night exposure.
Do I need headphones, or is a speaker fine?
A speaker is fine and often better for sleep, since headphones can be uncomfortable overnight. Place your phone or laptop a few feet from the bed and set the volume just loud enough to blur background noises. Headphones work too if you share a room.
Does this use my mobile data while it plays?
No. After the page loads, all sound is generated locally on your device — nothing streams. You can even turn on airplane mode after loading the page and it will keep playing (on most devices).
