Free Sleep & White Noise Generator

What is a white noise generator?

A noise generator plays a steady, soothing wash of sound that masks sudden noises — traffic, a barking dog, a snoring partner — so your brain has nothing to latch onto. It is a popular, drug-free aid for falling asleep, focusing, or settling a restless mind.

The noise colours, explained

• White noise — equal energy across every frequency; bright and hissy, like radio static. Excellent for masking.
• Pink noise — softer and deeper than white, balanced and natural like steady rain. A favourite for sleep.
• Brown noise — deep and rumbly, like a waterfall or distant thunder. Very relaxing.
• Blue and violet noise — brighter, higher-frequency sounds, sometimes used for tinnitus relief.
• Grey noise — tuned to feel equally loud across the range your ears are most sensitive to.

How to use it

1. Choose a noise colour above.
2. Press Play and set the volume to a comfortable level.
3. Set a sleep timer (15 to 60 minutes) and it will fade out on its own.

Winding down for the night? Pair it with a meditation timer session, or slow your breathing first with our free breathing exercises.

FAQ

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

They differ in how sound energy is spread across frequencies. White is bright and even, pink is softer and more balanced, and brown is deep and rumbly. Many people find pink or brown the most relaxing for sleep.

Which noise is best for sleep?

It is personal, but pink and brown noise are the most common choices because they are gentler on the ears than white. Try each for a minute and notice what feels most calming.

Is this noise generator free?

Yes — completely free, with no sign-up and no ads. The sound is generated live in your browser, so nothing is downloaded.

Does the sleep timer fade out?

Yes — when the timer ends, the sound fades out smoothly so it will not jolt you awake.

This tool is for general wellbeing and is not a substitute for medical care.