What is White Noise Generator?
This generator synthesizes three noise types in real time with the Web Audio API: white (uniform across frequencies), pink (softer low end, great for sleep), and brown (deeper, strongest masking). A volume slider gives precise control, and a 5-90 minute sleep timer stops playback automatically. Every sound is generated live from code — no audio files to download, and it keeps working offline after the first load. Use it for sleep, deep focus, masking office noise, or calming a baby.
▶Use Cases5 scenarios
- ◆Falling asleep and building a sleep environment
- ◆Masking background noise during deep work
- ◆Drowning out open-office chatter
- ◆Calming babies with white noise
- ◆Meditation and relaxation
▶How to Use4 steps
- 1Pick a noise type: white, pink, or brown
- 2Adjust the volume slider (0-100)
- 3Optionally set a 5-90 minute sleep timer
- 4Press play to start; the timer stops it automatically
▶Features7 features
- ✓Free
- ✓No signup
- ✓White, pink, and brown noise
- ✓Real-time Web Audio synthesis
- ✓Adjustable volume
- ✓5-90 min sleep timer
- ✓No audio files — works offline
▶FAQ5 questions
What is this white noise generator?
An online noise synthesis tool. Input: none (pick a noise type and volume). Output: white, pink, or brown noise synthesized in real time by the browser, with a 5-90 minute sleep timer. Sound is generated live via the Web Audio API — no audio files, works offline after first load.
What is the difference between white, pink, and brown noise?
White noise has equal energy across frequencies (a hissing sound). Pink noise has more low-end energy and sounds softer — great for sleep. Brown noise has the strongest low end and deepest sound, making it best for masking ambient noise.
How long can the sleep timer run?
Up to 90 minutes. Playback stops automatically when the timer ends, so you can fall asleep without leaving it running all night.
Do I need to download audio files?
No. All noise is synthesized live from code. After the first page load it even works offline.
Is this tool free?
Yes, completely free. No accounts, no signup.