White noise, done right.
Press play — free, no ads, all night. Three depths, and three deeper cousins below.
Switch depth in the bar below — Deep is the one our app users fall asleep to.
Why depths matter
Most noise sites give you one take of each color. But masking comfort is personal: what feels soothing to one ear feels harsh to another. Our Standard / Medium / Deep variants shift each sound's energy progressively lower — same masking power, less hiss, more rumble. In our sleep apps, the deep variants are what people actually stay on. Try White at Standard, then switch to Deep: same color, completely different feeling.
Not sure which sound to pick?
Take the 60-second quiz
Answer six quick questions about how you sleep and focus, and get the noise color that fits.
Find your sound →White vs brown noise
They sound like cousins but behave differently. The comparison, without the hype.
Read the comparison →For babies
Womb & shush sounds, safe-volume player, and the free Crib Check for your nursery.
Open the baby tools →For tinnitus
Match your tinnitus pitch, then play noise with a personalized notch at that exact frequency.
Open the tinnitus tools →What is white noise?
White noise is sound that contains every audible frequency at equal intensity — the audio equivalent of white light. To the ear it sounds like steady static, a hard rain on a roof, or an untuned radio. Because it covers the whole frequency spectrum at once, it acts like an acoustic blanket: sudden sounds (a door, a car horn, a snoring partner) stand out less against it, which is why so many people use it to fall asleep, stay asleep, or focus in noisy places.
Research on noise as a sleep aid is genuinely promising but not settled. A 2021 systematic review in Sleep Medicine Reviews (Riedy et al.) found that continuous noise can improve sleep onset in noisy environments, while calling for better-controlled studies. In other words: it clearly helps many people, it is low-risk and free to try, and anyone promising miracles is overselling it. Our approach on this site is to let you test it yourself — the soundboard above is the whole experiment.
White, pink, brown, green — the colors of noise
Not all noise is white. Pink noise rolls off the harsh high frequencies, so it sounds softer — closer to steady rainfall. Brown noise concentrates its energy in the low end: waterfall, ocean swell, airplane cabin — deep-dive in our brown noise guide. Green noise sits in the middle frequencies, like wind through trees — the newest favorite for people who find white too sharp and brown too dark. And each of them goes deeper with the Medium and Deep variants in the player bar.