White Noise Machine
Generate and mix white, pink and brown noise with rain, ocean, wind and fan sounds to sleep, focus or block distractions. Set a sleep timer and let it fade out on its own.
How the White Noise Machine works
A white noise machine plays a steady, soothing sound that masks sudden noises so you can fall asleep, concentrate or calm a baby. This one runs entirely in your browser — press Play, then turn on the sounds you like and set each one's volume to build your own blend. White noise is bright and even like static; pink noise is softer and fuller like steady rain; brown noise is a deep rumble like distant surf. The rain, ocean, wind and fan sounds are shaped from a noise buffer generated in your browser, so nothing is downloaded. Set the sleep timer and the sound fades out on its own. Need a pure test tone instead? Use the Tone Generator. For a softer, rainfall-like sound try the Pink Noise Generator, or the Brown Noise Generator for a deeper rumble.
Frequently Asked Questions
What is the difference between white, pink and brown noise?
White, pink and brown noise are all steady, random sounds, but they differ in how energy is spread across frequencies. White noise has equal energy at every frequency and sounds bright, like radio static. Pink noise reduces the higher frequencies so it sounds fuller and softer, similar to steady rainfall. Brown (or red) noise cuts the highs even more, giving a deep rumble like a waterfall or distant surf. Many people find pink and brown noise more relaxing for sleep, while white noise is good for masking sudden sounds.
Does the white noise machine have a sleep timer?
Yes — the white noise machine has a sleep timer. Choose 15, 30, 45 or 60 minutes and the sound will gently fade out and stop when the timer ends, so it will not play all night. You can also stop everything instantly with the Stop all button. The timer runs in your browser tab, so keep the tab open for it to work.
Are the sounds recordings or generated?
The sounds are generated live on your device with the Web Audio API — there are no audio files to download and nothing is uploaded. The rain, ocean, wind and fan sounds are built by shaping and modulating a noise buffer generated in your browser and looped continuously. Because that buffer is made locally, the machine keeps working offline once the page has loaded.
Can I mix several sounds together?
Yes — several sounds can play at once. Turn on as many as you like and set each one's volume independently to build your own blend — for example brown noise under gentle rain, or ocean with a little wind. Your device does the mixing in real time. Yes. Each sound has its own volume slider and they all play at once, so you can build a blend rather than pick a single source — a little rain over brown noise, or wind under a fan, for example. The mix is generated live in your browser, so there is no limit on how long it plays and no audio file to download.
Last updated: