About the Noise Generator
Steady noise covers up sudden sounds, which is why many people use it to sleep, study or settle a baby. This generator makes three kinds in your browser: white noise, which is a bright hiss; pink noise, which is softer and more like steady rain; and brown noise, which is deep like a waterfall. Pick one, set the volume, choose a timer if you want it to stop by itself and press Play. The sound is created fresh from random numbers and loops smoothly without a gap or click, so it can play for hours without repeating a pattern that your ear notices. Nothing is downloaded, so it also works with a weak connection.
Updated October 2026
How to use the Noise Generator
- 1Choose white, pink or brown noise.
- 2Set the volume to a comfortable, quiet level.
- 3Choose a timer if you want it to stop by itself.
- 4Press Play.
- 5Press Stop when you are done.
Why steady noise helps
Our ears wake us not by loud sounds, but by changes in sound: a door closing, a car passing, a voice. A steady background of noise makes those changes smaller compared with the whole, so they are less likely to catch your attention. That is the idea behind white noise machines and fans.
Pink and brown noise carry more of their energy in the low frequencies, which are similar to natural sounds like rain, wind and surf. Some people find these calmer for that reason.
Tips for using it
- Keep the volume lower than you think you need.
- Put the speaker a metre or two from your bed, not next to your ear.
- Use the timer if you only need help falling asleep.
- Try a quiet setting during work for focus.
- Check with a doctor if you have ringing in the ears or trouble sleeping that continues.
Related tools
Try a pure pitch with the Tone Generator, and shape sounds with the Audio Equalizer. If you want to wind down before sleep, the Breathing Exercise Timer guides your breath, and the Sleep Calculator suggests bedtimes that match your sleep cycles.
Features
- White, pink and brown noise
- Volume slider
- Timer: 15 minutes to 8 hours
- Smooth loop with no click
- Switch type while playing
- No download, no account
- Works on phones and computers
Frequently asked questions
What is the difference between white, pink and brown noise?
White noise has equal power at every frequency and sounds like a hiss. Pink noise has less power at high frequencies and sounds softer, like rain. Brown noise is even deeper, like a rumble.
Which noise is best for sleep?
It varies from person to person. Many people prefer pink or brown noise because they are less sharp than white noise. Try each for a few nights.
Is it safe to play all night?
Keep the volume low, about as loud as a quiet conversation or less. Do not use headphones or earbuds at high volume for long periods. For babies, keep any sound source far from the cot and quiet.
Does it help me focus?
Some people find that steady noise masks distractions and helps them concentrate. Research is mixed, so trust your own experience.
Why does the sound stop on my phone?
Some phones pause web audio when the screen is locked. Keep the screen on, or use the do not disturb setting with the page open.
Is the loop noticeable?
The loop is eight seconds of random noise with soft joins. Random noise has no melody, so the repeat is not noticeable.
Does it use data?
No. The noise is made on your device, so it works with almost no connection after the page has loaded.