This pink noise generator starts with the useful part: press Play and hear a fresh signal made in your browser. Pink is selected by default; White and Brown are included as quick comparisons. Nothing is recorded or uploaded, and the 30-second WAV export is created locally on the same device.
Browser generator · no upload
Play pink noise
The signal is created on this device. The page does not request a microphone, record a room or upload audio.
Start with device volume low. Tool level starts at 5% and is not calibrated dB SPL. Stop if the sound feels uncomfortable.
Equal power in each octave gives a softer top end than white noise.
Pink noise is ready. Press Play to start.
How to use the pink noise generator
- Turn your device volume down before starting. The tool level begins at 5%, but that percentage is only digital gain inside this page. It is not a sound-pressure reading.
- Leave Pink selected and press Play. If you want a direct comparison, switch to White or Brown while the player is running. The signal changes without starting a second audio stream.
- Set a timer or download a short file only if you need it. The timer fades the signal before stopping. Download creates a new 30-second mono, 16-bit PCM WAV using the selected tool level. It is not a recording of the stereo preview; keep external-player volume low when opening it.
If an iPhone stays silent, keep device volume low and check that sound is routed to the intended speaker or headphones. Tap Play again if the page reports blocked playback. A running audio context confirms that the browser started its audio engine; it cannot confirm that your output device is audible. Stop before changing the output route.
What pink noise actually is
Pink noise is random noise whose power spectral density is proportional to 1/f. That density falls by about 3 dB each time frequency doubles, leaving roughly equal power in each octave. The University of Illinois acoustical-physics notes on white, pink and brown noise show the three profiles as 1/f⁰, 1/f¹ and 1/f².
That distinction is why pink noise sounds less bright than white noise. White noise is flat per hertz, and higher octaves contain many more hertz-wide bins than lower octaves. Pink noise reduces the density as frequency rises, balancing power by octave rather than by one-hertz slice.
The slope describes a statistical signal rather than a fixed pitch. Pink noise contains continuously changing random samples across a broad spectrum. If you need an exact periodic frequency such as 440 Hz, reach for the Online Tone Generator instead.
Pink vs white vs brown noise
| Noise color | Power-density profile | Typical impression | Useful check |
|---|---|---|---|
| White | Flat per hertz, 1/f⁰ | Bright, steady hiss | Broadband signal path and obvious high-frequency response |
| Pink | About −3 dB/octave, 1/f | Softer and more balanced by octave | Broad listening comparison and spectrum reference |
| Brown | About −6 dB/octave, 1/f² | Deeper, bass-heavy rumble | Compare how a system handles stronger low-frequency weighting |
Those descriptions aren't promises that every laptop, phone, speaker or headphone reproduces the profile accurately. Small speakers may remove much of the low end from brown noise, and a room and playback system can create peaks and dips that aren't present in the digital source.
How this browser generator works
The page creates an output-only Web Audio graph after a deliberate Play tap. That matters because modern browsers restrict audible autoplay; MDN's Web Audio best-practice guidance recommends creating or resuming the audio context from a user gesture.
White mode starts from independent random samples. Pink mode filters those samples to approximate a 1/f spectrum; Brown uses leaky integration for a bass-heavy, approximately 1/f² profile. The live player generates two independent channels. Stop briefly fades the output before disconnecting the source. The pink filter follows Paul Kellet's published filter design. These are finite-band approximations, not certified reference spectra at every sample rate.
A browser interruption can stop playback. MDN documents an interrupted AudioContext state on iOS Safari when a page is backgrounded or another app takes audio. This tool stops on page hide and rebuilds an interrupted context on the next user tap.
What the tool can and cannot tell you
The generator can supply a practical digital reference, let you hear the difference between nominal noise colors and create a short file for an editing test. It cannot certify the acoustic result at your ears. Browser gain, system volume, amplifier gain, transducer sensitivity, fit and distance all change the real sound-pressure level.
To inspect what a microphone or finished file actually contains, use the Audio Spectrum Analyzer. When you want to map a peak or EQ term to a broad region, open the Audio Frequency Chart. A generated target and a measured result are different jobs.
A careful note about sleep and focus claims
People commonly use steady background noise because they prefer it or because it makes intermittent room sounds less distinct. That personal use is not the same as a proven treatment. A systematic review of white and pink auditory stimulation in adults found positive results in some studies but concluded that the evidence was not strong. Another systematic review of continuous noise as a sleep aid rated the overall evidence as very low quality. A 2026 laboratory study of 25 adults found less REM sleep during its pink-noise condition than during the quiet control night. A separate 2026 pilot study of 12 adults found that pink noise reduced some traffic-noise-related sleep disruptions under different laboratory conditions. Both studies were small and short-term. Neither establishes that leaving this browser generator on will improve your sleep.
Treat the generator as an audio tool. It isn't a treatment for insomnia, tinnitus, ADHD, hyperacusis or another condition. If a symptom affects sleep, hearing or daily life, the useful next step is professional advice rather than increasing the volume of a browser signal.
Keep the level conservative
Noise can feel less eventful than music, but exposure still depends on how loud it is and how long it plays. The WHO safe-listening guidance recommends keeping personal-device volume down, limiting time and taking breaks. CDC/NIOSH likewise explains that hearing risk depends on both measured level and exposure duration.
This page intentionally starts at a low tool gain and caps its own control at 25%. That cap cannot override a device or amplifier set too high, so lower system volume first. Stop immediately if the sound is uncomfortable, if your ears ring or if hearing feels dulled.
Pink noise generator FAQ
Is this pink noise generator free?
Yes. Playback, color comparison, the timer and the 30-second WAV export work in the browser without an account or upload.
Does the page record my microphone?
No. The tool creates an output signal and never calls for microphone access. It does not read an audio file or send generated samples to a server.
Why does pink noise sound softer than white noise?
Pink noise reduces power density as frequency rises, by about 3 dB per octave. White noise remains flat per hertz, so its upper octaves contain more total power and usually sound brighter.
Is pink noise the same as rain?
No. Rain can have a broadly similar soft, steady character, but a real rain recording contains changing impacts, resonances and environmental detail. Pink noise is a statistical 1/f signal.
Can I use the downloaded WAV as a calibrated test signal?
You can use it as a nominal digital pink-noise file, but it does not calibrate the playback chain. Acoustic calibration still requires suitable measurement equipment, a known reference level and a controlled procedure.