White Noise Generator — 45 Free Ambient Sounds for Sleep & Focus
Mix custom soundscapes from 45 high-quality synthesized sounds
The most powerful free online white noise generator. Mix and match 45 professionally synthesized ambient sounds across 6 categories — from pure noise types and nature sounds to mechanical hums and binaural beats. Create your perfect soundscape for sleeping, studying, meditating, or simply relaxing. Set a sleep timer with gradual fade-out, export your custom mix in any audio format, and share your creations with anyone.
What You Can Do
- 45 high-quality sounds synthesized in real time using the Web Audio API — no samples, no downloads
- Mix unlimited sounds together with independent volume controls for each
- 6 types of pure noise: white, pink, brown, blue, violet, and grey — each with distinct characteristics
- 14 nature sounds: rain, ocean waves, thunder, river, wind, birds, crickets, and more
- 10 ambient sounds: fan, air conditioner, airplane cabin, train, café, and more
- 7 relaxation sounds: fireplace, singing bowls, heartbeat, purring cat, wind chimes
- Binaural beats with 4 presets (sleep, meditation, focus, energy) and custom controls
- Sleep timer with customizable fade-out duration
- Background playback — audio continues when browser is minimized
- Export your mix in WAV, MP3, OGG, OPUS, FLAC, or AAC with custom duration and quality
- 10 built-in presets: Rainy Night, Deep Sleep, Meditation, Office Focus, and more
- Save and share your custom mixes via URL
How to Use the White Noise Generator
- Click any sound card in the grid to activate it. The sound starts playing immediately.
- Adjust each sound's volume using its individual slider. Combine multiple sounds to create your ideal mix.
- Try a built-in preset like "Rainy Night" or "Deep Sleep" for an instant soundscape.
- Set a sleep timer if you want the sounds to stop automatically after a set time.
- To save your mix, click "Save Mix" and give it a name. Share it with anyone using the share link.
- To export, choose your duration, format, and quality, then click Download.
Frequently Asked Questions
What is white noise and how does it help with sleep?
White noise contains equal energy across all frequencies, creating a consistent "shh" sound that masks disruptive noises. It helps your brain relax by providing a steady auditory backdrop, making it easier to fall asleep and stay asleep. Studies show it can reduce the time it takes to fall asleep by up to 40%.
What is the difference between white, pink, and brown noise?
White noise has equal energy at all frequencies (like TV static). Pink noise has more bass energy, sounding like a waterfall or steady rain — many people find it more natural and soothing. Brown noise emphasizes even lower frequencies, producing a deep rumble like distant thunder. Each type works differently for different people.
Will the sound keep playing if I minimize my browser?
Yes! The generator uses multiple techniques to keep audio playing in the background: Web Audio API, Media Session API, and browser keep-alive mechanisms. It works on desktop and most mobile browsers. On iOS, keeping the browser in the foreground or screen on is recommended for best results.
What are binaural beats?
Binaural beats occur when slightly different frequencies are played in each ear. Your brain perceives a "beat" at the difference frequency. For example, 200 Hz in the left ear and 207 Hz in the right creates a 7 Hz theta wave associated with meditation. Headphones are required for this effect.
Can I export my mix as an audio file?
Yes. Choose your desired duration (1 to 60 minutes), audio format (MP3, WAV, OGG, FLAC, OPUS, or AAC), and quality settings. The mix is rendered and encoded entirely in your browser — no upload needed.
How many sounds can I mix at once?
There is no hard limit — you can activate as many sounds as your device can handle. Most devices easily support 8–12 simultaneous sounds. The mixer provides independent volume control for each active sound.
Is my data private?
Absolutely. All audio is generated and processed entirely in your browser using the Web Audio API. No sound data is ever sent to any server. Your saved mixes and preferences are stored locally on your device.
The Most Powerful Free White Noise Generator
Unlike basic noise generators that offer a few static loops, Timbrica's White Noise Generator synthesizes all 45 sounds in real time using advanced Web Audio API techniques — from spectrally accurate noise types to realistic nature simulations. Every sound has natural variation so it never feels repetitive. The built-in mixer, sleep timer with fade-out, background playback, and full export capabilities make this a complete sleep and focus solution — entirely free, with no account required.
