White Noise Generator for Focus & Sleep
Generate white, pink, or brown noise for concentration, relaxation, and sleep. No ads, no signup.
Runs in your browser. No data leaves your device.
Frequently Asked Questions
How does the White Noise Generator work?
The generator fills an AudioBuffer with random samples using different algorithms for each color. White noise uses uniformly random values, pink noise applies a Voss-McCartney filter that rolls off high frequencies at 3 dB per octave, and brown noise integrates successive random steps for an even steeper rolloff. The buffer loops continuously through the Web Audio API with no streaming or downloads.
What is the difference between white, pink, and brown noise?
White noise has equal energy at all frequencies (like static). Pink noise reduces higher frequencies for a softer sound (like rain). Brown noise reduces highs even further for a deep rumble (like a waterfall). Most people find pink or brown noise more pleasant for sleep.
Can I use it while sleeping?
Yes. The noise generator runs continuously. Keep the tab open and your device plugged in. Some browsers may pause audio when the screen locks, so check your device settings.
Does it use a lot of battery or data?
The noise is generated locally using the Web Audio API -- no audio files are streamed. Data usage is zero and battery impact is minimal.