White Noise Generator

✓ 100% FREE — No Signup Needed

Sleep deeper, focus better. Pure generated sound — no streaming, no ads, works offline.

🌊White NoiseBright hiss — masks voices
🌧️Pink NoiseBalanced — like rain
💤Brown NoiseDeep rumble — best for sleep
⛈️RainGentle rainfall

Choose a sound and press play.

White Noise FAQ

What is the difference between white, pink and brown noise?

White noise has equal energy across frequencies (bright hiss). Pink noise softens high frequencies (balanced, like steady rain). Brown noise emphasizes low frequencies (deep rumble, like a waterfall).

Does white noise help with sleep?

Many people find steady background noise masks sudden sounds that wake them up. Try brown or pink noise for sleep — they sound warmer and less harsh than white noise.

Can I use this while working?

Yes. White or pink noise at low volume helps many people focus by covering distracting background chatter. Keep the volume moderate.

Does this use my internet data?

No. All sounds are generated mathematically in your browser with the Web Audio API. Once the page loads, it works offline with zero streaming.

What volume is safe for all-night white noise?

Keep it at or below about 50 decibels — roughly a quiet conversation — measured at your pillow. Louder playback can fragment sleep and, over months, contribute to hearing strain. If you must raise your voice to talk over it, it is too loud.

Is white noise safe for babies?

Paediatricians generally say yes with precautions: keep the volume low, place the machine across the room rather than in the crib, and avoid maximum volume all night. The goal is masking household noise, not filling the nursery with sound.

Does this generator work offline or use mobile data?

After the page loads, the sound is synthesised mathematically inside your browser — no audio is streamed, so it uses no ongoing data and keeps working if your connection drops. That also means zero buffering interruptions mid-nap.

How white, pink, and brown noise are generated

Your browser synthesises these sounds live with the Web Audio API — no audio files, no streaming, no data use after the page loads. It starts from pure randomness: at a 44,100 Hz sample rate, the browser produces 44,100 random values every second, one per audio sample. That raw static is white noise — equal energy at every frequency, which the ear hears as a bright hiss, like an untuned TV.

The three colours, precisely

White noise: equal energy per hertz — bright, hissy, best at masking sharp sounds like speech and clattering dishes. Pink noise: filtered so energy falls 3 dB per octave (equal energy per octave) — deeper and softer, like steady rain; studies on sleep most often test pink noise. Brown noise: energy falls 6 dB per octave — a deep rumble like a waterfall or distant thunder, favoured by people who find white noise too harsh. The names come from the light spectrum analogy, not from actual colours.

Practical tips and limits

Keep the volume moderate — around a quiet conversation (~50 dB) or lower for all-night use; noise that is too loud fragments sleep instead of protecting it. For babies, paediatric guidance is consistent: low volume, machine across the room, not blasting all night. Pink or brown noise usually suits sleep better than white; white suits office masking better. And a real limit: noise masks sound disturbance only — it cannot fix an uncomfortable mattress, late caffeine, or an irregular schedule.

Tinnitus masking and office focus

Beyond sleep, coloured noise has two well-established uses. Tinnitus masking: many people with ringing ears find that low-level broadband noise — often pink or brown rather than white — makes the ringing less noticeable, especially at night; hearing professionals sometimes recommend exactly this as a first, free step before clinical sound therapy. Office masking: open-plan speech is the top concentration killer, and steady low-volume noise raises the background just enough to blur intelligible words without becoming a distraction itself — brown or pink noise at low volume works best here, since white noise's hiss can irritate over hours. In both cases the dose rule holds: the quietest level that does the job.

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