White noise generator
White, pink and brown noise with a sleep timer and a gentle fade-out.
White
00:00
Playing time
Not playing
Press Esc to exit
Options
The sound is generated on your device. Nothing is downloaded, recorded or uploaded.
Related tools
Steady noise covers the sounds you cannot control: a neighbour's television, traffic, an open-plan office. This page makes that noise in your browser instead of streaming it, so it never buffers and uses no data. Pick a colour, set the volume, and add a sleep timer with a fade-out if it should stop on its own. White noise is a bright hiss, pink noise is softer and closer to rain, brown noise is deeper, like a distant waterfall.
How to use
- Choose a colour: white, pink or brown.
- Press Play. The first press also starts the audio, because browsers block sound that begins on its own.
- Raise the volume slowly until the noise just covers what you want to mask.
- Pick a sleep timer and a fade-out if the noise should stop by itself, then leave the tab open.
- Press Go fullscreen for a dark screen with the countdown, and Esc to come back.
What it handles
- One generator, three colours: white is flat, pink drops 3 dB per octave, brown drops 6 dB. All three are levelled to the same loudness, so switching colour does not send you back to the volume slider.
- The loop has no click: the end of the buffer is crossfaded into the start, so there is no ticking seam and no short pattern your ear can learn.
- The fade-out is never longer than the timer it belongs to. A 15-minute timer with a longer fade selected simply fades across the whole 15 minutes.
- The fade is scheduled in the audio engine rather than stepped by a script, so it stays smooth and ends on time even when the tab is in the background.
- Left and right get two independent noise channels, which is wider and less tiring on headphones than the same signal sent to both ears.
FAQ
What is the difference between white, pink and brown noise?
They differ in how energy is spread across the frequencies. White noise has the same energy everywhere and sounds bright and hissy. Pink noise drops by 3 dB per octave, so the top end is softer and it sounds closer to steady rain. Brown noise drops by 6 dB per octave and sounds deep, like a distant waterfall.
Does it download or stream any audio files?
No. There is no MP3 and no stream. The noise is calculated in your browser with the Web Audio API and played from a buffer that repeats seamlessly. That is why it starts instantly, and why nothing about your session ever reaches a server.
Can I leave it running all night?
Yes, on a computer or a tablet with the tab open. Set a sleep timer if you would rather it stopped. On a phone it depends on the browser and the operating system: some keep the audio going when the screen locks, others stop it. Test it before you rely on it, and keep the device charging.
Why does nothing happen until I press Play?
Browsers refuse to start audio without a click or a tap, so that pages cannot make noise on their own. The first press builds the audio engine and starts playback in the same gesture. If you still hear nothing, check that the tab is not muted and that the slider here is not near zero.
Does the timer stop the noise abruptly?
Only if you set the fade-out to none. Otherwise the volume slides down to silence over the length you choose, up to two minutes, and playback stops at zero. The countdown on screen and in the tab title shows how much is left, so you can see the fade coming.
Updated