What is the difference between white, pink and brown noise?

White noise has equal energy at every frequency and sounds hissy, like TV static. Pink noise has equal energy per octave, so the treble is softer — like steady rain — and many people find it best for focus. Brown noise is weighted even more toward the bass, like a waterfall or distant thunder, and is popular for sleep. Try each and keep the one you find most comfortable.

Does white noise really help with sleep and focus?

A steady background sound masks sudden noises such as voices or doors, so they are less likely to break your concentration or wake you, and many people fall asleep or focus more easily. Results vary and it is not a medical treatment. Keep the volume just loud enough to cover the surrounding noise, especially with headphones.

Will the sleep timer work in the background or with the screen locked?

The fade-out is scheduled on the audio clock, so it fades and stops on time even when you switch tabs. Whether audio keeps playing with the phone locked depends on the browser and OS — some pause web audio. For all-night playback, export the mix as an MP3 and loop it in your phone’s music player.

Are these recordings? Is anything uploaded or paid?

They are not recordings: everything is synthesized in your browser, so there are no licensing issues and you can use the exported audio freely. Saved mixes stay in your browser and are never uploaded. The tool is free with no sign-up.

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🍃White Noise & Ambient Sound Mixer - Rain, Ocean, Fire

Need to drown out office chatter while you work, or fall asleep to rain and waves? This mixer puts eleven sounds side by side, each with its own volume slider, so you can layer them freely: white, pink and brown noise, rain (a rushing curtain of rain plus random falling drops), ocean waves (swells that build and break), wind (gusts that rise and fall), campfire (a low roar with crackles and pops), stream (running water with bubbles), birds (several kinds of chirps and trills), café (distant murmuring voices and clinking cups) and a fan hum. Every sound is synthesized in your browser by algorithms — no recordings are downloaded — and each one is a seamless 10–40 second loop, so long sessions have no audible seams. Apply a scene such as Focus, Sleep, Rainy night, Forest, Beach or Café with one click, or name and save your own mix in this browser to load it next time. The sleep timer runs from 15 minutes to 2 hours and fades the sound out gently before stopping. You can also export the current mix as a 1–120 minute MP3 or WAV to play offline on your phone or speaker.

Free · No sign-up · Runs in your browserLast updated: 2026-10-26

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How to use White Noise & Ambient Sounds

1Pick a scene, or drag the volume sliders to build your own mix
2Press Play, set the master volume and, if you like, a sleep timer
3Save the mix under a name, or choose a length and format and export MP3 / WAV

FAQ

What is the difference between white, pink and brown noise?: White noise has equal energy at every frequency and sounds hissy, like TV static. Pink noise has equal energy per octave, so the treble is softer — like steady rain — and many people find it best for focus. Brown noise is weighted even more toward the bass, like a waterfall or distant thunder, and is popular for sleep. Try each and keep the one you find most comfortable.
Does white noise really help with sleep and focus?: A steady background sound masks sudden noises such as voices or doors, so they are less likely to break your concentration or wake you, and many people fall asleep or focus more easily. Results vary and it is not a medical treatment. Keep the volume just loud enough to cover the surrounding noise, especially with headphones.
Will the sleep timer work in the background or with the screen locked?: The fade-out is scheduled on the audio clock, so it fades and stops on time even when you switch tabs. Whether audio keeps playing with the phone locked depends on the browser and OS — some pause web audio. For all-night playback, export the mix as an MP3 and loop it in your phone’s music player.
Are these recordings? Is anything uploaded or paid?: They are not recordings: everything is synthesized in your browser, so there are no licensing issues and you can use the exported audio freely. Saved mixes stay in your browser and are never uploaded. The tool is free with no sign-up.