Random Noise Generator Online — Free White, Pink & Brown Noise
Generate random audio noise online — white, pink, or brown — for sleep, focus, masking distractions, or audio testing. Continuous random playback, free and in your browser.
Noise will play continuously until you press Stop.
What is Random Noise?
Random noise in audio is a signal whose sample values are statistically random — meaning each instant of the waveform is unpredictable. The most familiar form is white noise: a signal where every audible frequency carries the same average energy. Variations like pink (1/f) and brown (1/f²) noise are still random, but with different spectral colourations.
Random noise is invaluable in audio testing, acoustic measurement, sleep masking, focus aids, hearing tests, electronics prototyping, and stochastic music generation. Our online random noise generator gives you all three classic colours instantly, with a sleep timer for convenience.
Features
Three Noise Colours
White (flat), pink (warm 1/f), brown (deep 1/f²) — all generated live with no recordings.
True Random Each Time
Buffer regenerated with fresh random values every session — no audible loop point.
Built-In Sleep Timer
Auto-stop after 5, 15, 30, 60, or 120 minutes — perfect for bedtime use.
Volume & Fade Control
Smooth fade-in prevents startling. Adjust volume in real time without dropout.
Browser-Native
Runs on any device with a modern browser. No app, no install, no signup.
Listening Safe
Sensible default volume. Smooth ramps in and out. Hearing safety reminders included.
Common Uses
Mask snoring, traffic, and intermittent night-time noises to stay asleep longer.
Drown out office chatter and notification dings to stay deep in flow.
White noise mimics the womb environment and can help newborns settle.
Lower volumes of pink or brown noise can mask ringing in the ears.
How to Use
1. Choose Waveform
Pick sine, square, sawtooth, or triangle depending on the tone character you need.
2. Set Frequency
Use the slider or tap a preset to dial the exact frequency you need.
3. Adjust Volume
Start at low volume — pure tones can be louder than they feel.
4. Press Play
Hit Play and the tone keeps playing continuously until stopped.
Frequently Asked Questions
White noise is the most common type of random audio noise. "Random noise" is a broader term that includes white, pink, brown, and other coloured noises — all of which have random sample values but different frequency spectra.
It masks unpredictable environmental sounds (knocks, voices, beeps) that would otherwise grab attention. By raising the ambient noise floor uniformly, your brain ignores it more easily.
Yes at moderate volume below 50 dB. Use our sleep timer if you prefer the noise to stop automatically after you fall asleep.
We regenerate a fresh 2-second buffer of random samples every session, and the loop point is statistically indistinguishable from any other point — your ear cannot detect the seam.
Yes — route the browser audio to a virtual cable (like BlackHole on macOS or VB-CABLE on Windows) and you can record or feed it into any DAW or measurement software.
Listening Safety
Keep overnight noise below 50 dB. For babies, place the device at least 7 feet away. Use the sleep timer to limit total exposure.