Noise Generator
Free online noise generator. Play continuous white, pink, brown, blue, and violet noise in your browser using the Web Audio API. 100% client-side, no signup.
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What is Noise Generator?
The Noise Generator is a free, browser-based tool that plays continuous colored noise for focus, sleep, relaxation, and sound masking. Using the Web Audio API it synthesizes five noise colors in real time — white, pink, brown, blue, and violet — each with a distinct frequency balance. There are no audio files to download and nothing is uploaded: every sound is generated locally on your device. An adjustable volume slider, instant mute, and a 15–60 minute sleep timer let you tailor the experience, whether you are studying for an exam, working in a noisy office, or trying to fall asleep.
Key Benefits
- Mask distracting background noise to concentrate more easily, especially with ADHD
- Fall asleep faster and stay asleep by drowning out sudden disturbances
- Choose from five scientifically defined noise colors for different uses
- Save battery and data — real-time synthesis needs no streaming or downloads
- 100% private: no audio ever leaves your browser, no account required
Common Use Cases
- •Focus while working or studying in open-plan offices and shared spaces
- •Sleep aid for insomnia, tinnitus masking, or a snoring partner
- •Soothe crying babies with steady brown or white noise
- •Audio and speaker testing, room calibration, and headphone burn-in
- •Improve privacy in therapy rooms, HR interviews, and confidential meetings
How to Use the Noise Generator
- Pick a Noise Color: Choose from white, pink, brown, blue, or violet noise. Brown is great for sleep, pink for focus, and white for general sound masking.
- Press Play: Click the large round play button. The noise starts instantly using the Web Audio API — there is nothing to download.
- Adjust the Volume: Use the volume slider to find a comfortable level, or click the speaker icon to mute instantly.
- Optional: Set a Sleep Timer: Choose 15, 30, 45, or 60 minutes and the noise will stop automatically when the countdown reaches zero — perfect for falling asleep.
Key Features
- Five scientifically generated noise colors: white, pink, brown, blue, and violet
- Real-time synthesis with the Web Audio API — no downloads or looping audio files
- Adjustable volume slider with instant mute toggle
- Sleep timer with 15, 30, 45, and 60-minute presets that stop automatically
- Switch noise color instantly while playing, with seamless transition
- 100% client-side — no audio is ever uploaded, no signup required
Frequently Asked Questions
What is the difference between white, pink, and brown noise?
White noise has equal energy at every frequency and sounds like harsh TV static. Pink noise has more low-frequency energy and sounds softer, like steady rain. Brown noise is even deeper, resembling a low rumble like a distant waterfall or airplane cabin. In general, pink and brown noise are more relaxing for sleep, while white noise is better at masking sudden sharp sounds.
Does the noise generator work offline?
Once the page has loaded, the noise is synthesized in real time by your browser using the Web Audio API. No audio files are streamed or downloaded while playing, so it continues to work even if your connection drops.
Will the sleep timer stop the noise automatically?
Yes. Pick 15, 30, 45, or 60 minutes and a countdown appears. When it reaches zero the noise stops and the playback resets, which is ideal for falling asleep without the noise running all night.
Is it safe to listen to noise all day?
At moderate volumes (under about 60–70 dB, or a comfortable listening level) noise is generally safe for extended periods. Avoid setting the volume high enough to cause discomfort, and take breaks if you experience ear fatigue. If you have tinnitus or hearing concerns, consult a hearing-care professional.