Sleep Sound Generator
Mix calming sounds to fall asleep faster. Adjust each sound, combine them your way, and let the sleep timer fade everything out gently.
Sound mixer
White Noise
Masks background noise, like a fan.
Pink Noise
Softer and deeper than white noise.
Brown Noise
Deep rumble, like distant thunder.
Rain
Gentle rainfall on a window.
Sleep timer
No timer running. The timer fades the sound out over the last 2 minutes.
How to use
- Press Start on one or more sounds and set each volume to taste.
- Combine sounds — for example low brown noise plus soft rain.
- Set the sleep timer so the sound fades out after you fall asleep.
- Keep the phone volume comfortable and the screen off.
Note: Sounds are generated live with the Web Audio API, so they loop perfectly with no gaps. On iPhone, the tab must stay open and the silent switch must be off.
Tips
- Brown noise at low volume works best for most people as a base layer.
- Keep the total volume low enough that you can still hear a smoke alarm.
- Use the 30-minute timer to save battery overnight.