A white noise generator plays continuous random sound to mask distractions and help you sleep, focus, or relax. Choose from white, pink, or brown noise — each with a distinct character from sharp hiss to deep rumble.
Noise Channels
Equal energy · TV static hiss
-3dB/octave · Rain, gentle waterfall
-6dB/octave · Thunder, deep rumble
Live waveform visualization
How to Use the White Noise Generator
This free online white noise generator uses the Web Audio API to create continuous, smooth noise directly in your browser — no downloads, no subscriptions. Whether you need to block out a noisy office, help a baby sleep, or get into a focus state, just click play and adjust the volume.
Choosing Between White, Pink, and Brown Noise
White noise contains equal energy at all audible frequencies. It sounds like static or a fan on high speed. It's effective at masking sudden sharp sounds like keyboard clicks or doors closing, making it popular for office concentration.
Pink noise has more energy in lower frequencies (−3 dB per octave). It sounds like steady rainfall or a gentle waterfall — full-bodied but not harsh. Many sleep researchers consider pink noise more natural-sounding and easier to sleep through than white noise.
Brown noise (also called red noise) has even more bass energy (−6 dB per octave). It resembles strong wind, thunder rumbling in the distance, or a large waterfall. Brown noise is beloved by people with ADHD and those who find white noise too sharp or tiring.
Mixing Multiple Noise Types
You can run all three noise types simultaneously and blend them to your taste. For example, mixing mostly brown with a touch of pink creates a rich, layered sound that many people find more pleasing than any single type alone. Each channel has its own volume slider so you can dial in exactly the right balance.
Using the Sleep Timer
Set the sleep timer to 15, 30, or 60 minutes to automatically stop playback. This is useful if you use the noise to fall asleep — you won't need to get up to stop it, and it won't play all night. The timer counts down in the background even if you switch browser tabs.
Tips for Best Results
Use headphones or quality speakers — tiny phone speakers cut bass frequencies, reducing the effectiveness of brown noise in particular. Keep the volume at a level where you can still hold a normal conversation (roughly 50–60 dB) — loud noise exposure over hours can cause fatigue. The live waveform visualization shows you which channels are playing and at what amplitude.
FAQ
What is the difference between white, pink, and brown noise?
White noise has equal energy at all frequencies and sounds like a TV static hiss. Pink noise has more energy at lower frequencies, sounding fuller and softer — often compared to rain. Brown noise (also called red noise) is even deeper and bass-heavy, similar to strong wind or a rumbling waterfall. Many people find pink or brown noise easier to sleep with than sharp white noise.
Does white noise help with sleep?
Research suggests consistent background noise can mask sudden sounds (traffic, doors) that disrupt sleep. Many people use white or brown noise as a sleep aid. The sleep timer lets you automatically stop playback after 15, 30, or 60 minutes without setting a separate alarm.
Is this tool free?
Yes, completely free. No account or download required — it runs entirely in your browser.
Is my data private?
Yes. All audio is generated locally in your browser using the Web Audio API. No audio data is sent to any server.
Can I play multiple noise types at once?
Yes. You can toggle white, pink, and brown noise independently and mix them at different volumes to create a custom soundscape.
Does it work on mobile?
Yes. The tool works on mobile browsers (iOS Safari, Chrome for Android). On iOS, you may need to unlock the silent switch or enable audio permissions.