Noise Generator
Play white noise, pink noise, brown noise, and rain sounds through your browser. Adjust volume, set a sleep timer, and watch the live visualizer - all generated locally with no signup required.
Play white noise, pink noise, brown noise, and rain sounds through your browser using the Web Audio API. Adjust volume, set a timer, and relax - no signup required.
Equal energy per Hz - a consistent shhh sound that masks background noise. Best for concentration and Tinnitus relief.
All audio is generated locally using the Web Audio API. No audio data is streamed or recorded.
4 Noise Types
Choose from white noise, pink noise, brown noise, and synthetic rain. Each uses a unique algorithm for an authentic listening experience.
Adjustable Volume
Fine-tune the volume with a smooth slider control. Real-time adjustment lets you find the perfect level for your environment.
Sleep Timer
Set a timer to automatically stop playback after 5, 15, 30, 60, or 120 minutes. Perfect for falling asleep without wasting battery.
Real-Time Visualizer
A live audio visualizer shows the frequency spectrum of the current noise. Watch the bars dance to the sound you're hearing.
Better Sleep
Brown noise and rain sounds help mask disruptive noises and create a consistent ambient environment for falling asleep faster.
Deep Focus & ADHD
Brown noise is widely reported to help with ADHD focus and concentration. Pink noise is also popular for study sessions.
Baby Soothing
White noise machines are commonly used to soothe babies by mimicking the sounds they heard in the womb. Perfect substitute.
Tinnitus Relief
White noise can help mask the ringing associated with tinnitus by providing external sound stimulation at consistent frequencies.
Open Office Privacy
Mask conversations and office chatter with pink or brown noise to create acoustic privacy in open-plan workspaces.
Meditation & Relaxation
Rain sounds and brown noise create a calming backdrop for meditation, yoga, mindfulness, and stress relief practices.
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Frequently Asked Questions
What is the difference between white, pink, and brown noise?
White noise has equal energy across all frequencies - like radio static. Pink noise decreases in energy as frequency increases (equal energy per octave), sounding warmer and more natural - like steady rain. Brown noise has even more bass emphasis, creating a deep rumble - like a waterfall or thunder.
Is this tool free?
Yes, completely free with no signup, no account, and no usage limits. All audio is generated locally in your browser using the Web Audio API.
Does this use AI or pre-recorded audio?
No. All sounds are generated in real-time using mathematical algorithms through the Web Audio API. No AI, no pre-recorded samples, and no streaming. This means zero loading time and no bandwidth usage.
Can I use this for sleep?
Absolutely. The sleep timer feature lets you set auto-stop at 5, 15, 30, 60, or 120 minutes. Brown noise and rain sounds are particularly popular for sleep.
Does it work offline?
Yes. After the initial page load, the noise generator works completely offline since all audio is synthesized locally. No internet connection is required.
Will this drain my battery?
The Web Audio API is hardware-accelerated and designed for efficiency. However, continuous audio playback does consume some battery. Using the sleep timer can help preserve battery by stopping playback automatically.
Does this tool record or stream audio?
No. All audio generation happens entirely in your browser. No audio data is recorded, streamed, or transmitted anywhere. Your privacy is fully protected.
Why doesn't the visualizer show the actual frequency spectrum?
The visualizer provides an aesthetic representation of the current noise rather than a precise FFT analysis. This keeps CPU usage low and provides a pleasing visual experience. The bar heights give a general sense of the noise character.