Noise Generator
A pink noise generator and brown noise generator in your browser, with white noise too. Press play, set the volume and a stop timer, or download a clip of 1 to 10 minutes as WAV or MP3. It is a sound tool, not a treatment.
Play noise
Color
About 3 dB less per octave: softer and more even to the ear than white.
Starts low. Set your device volume low too, then raise it slowly.
Stopped
Keep the volume comfortable, especially on headphones and for long sessions. If you have to raise your voice to talk over it, it is too loud.
On a phone the sound and the timer can stop when the screen locks or you leave the browser. For long listening, download a clip and play it in your music app.
Download a clip
Length
Channels
16-bit WAV at 44.1 kHz, the exact samples. MP3 struggles more with noise than with music; use a high bitrate or WAV if you hear swirling.
A clip is saved at one fixed level, not at the volume slider's. It ends with a very short fade, so a loop in your player has a tiny gap.
About 50.5 MB
The sound is made in your browser. Nothing is uploaded.
How to use the noise generator
Nothing to install and nothing to upload.
- 1
Pick a color and press play
Choose pink, brown or white. You can switch while it plays: the sound crossfades and the level stays about the same, because all three are made at the same average level.
- 2
Set the volume and a timer
The volume starts low. Keep your device low as well and raise it slowly. The timer can stop the sound after 15 minutes to 8 hours, with a 5-second fade at the end.
- 3
Or download a clip
Pick 1, 2, 5 or 10 minutes, mono or stereo, WAV or MP3. The clip is written on your device, so it plays without this page, for example in a music app on a phone.
White, pink and brown noise: how they differ
All three are random sound. The color names how the power is shared out across frequencies.
| Noise | Power by frequency | Slope | Equal power in | Often described as |
|---|---|---|---|---|
| White | Flat | 0 dB per octave | Every band of the same width in Hz | A bright hiss, like an untuned radio |
| Pink | Falls as 1/f | About -3 dB per octave | Every octave | Softer, like steady rain |
| Brown | Falls as 1/f² | About -6 dB per octave | Neither: the lows dominate | A deep rumble, like distant surf |
What the evidence says about noise, sleep and tinnitus
Noise is widely sold as a sleep aid, but the research is thin. A 2021 systematic review in Sleep Medicine Reviews (Riedy and colleagues) rated the quality of evidence that continuous noise improves sleep as very low. Its authors said more research is needed before promoting continuous noise as a sleep aid, especially since it may also negatively affect sleep and hearing.
This page makes no claim that any color helps you sleep or focus. Some people simply like one of these sounds in the background, and that is a fine reason to use it, as long as the volume is low.
For tinnitus, the 2026 update of the American Academy of Otolaryngology's guideline lists sound enrichment among the ways to manage it, and the chair of the update group says no single approach works for everyone. This generator is not a medical device or a treatment. If you have ringing in your ears, or hearing changes, see a clinician.
How loud is too loud
Long listening is where volume matters. NIOSH, the US workplace safety institute, sets its recommended limit at 85 dBA averaged over an eight-hour workday and halves the allowed time for each 3 dBA above that. It is a workplace limit for adults, not a target, and longer days call for a lower level.
A web page cannot measure what reaches your ears, because that depends on your device and headphones. A useful rule from the same page: at 85 dBA you often have to raise your voice to be heard about 3 feet away. If this noise makes you do that, turn it down. Background noise should be much quieter than that.
How the sound is made
Pink
White noise through Paul Kellet's refined filter, which its source states is accurate to within 0.05 dB above 9.2 Hz at a 44.1 kHz sample rate.
Brown
White noise through a leaky integrator, which adds up the samples and slowly forgets them. The slope holds down to about 21 Hz, then flattens, so the sound does not drift off.
No clipping
All three colors are made at the same average level, -18 dB below full scale. A clip is measured first, and it would be lowered as a whole if a peak passed -1 dB.
What it does not do
The player repeats a 30-second loop with a crossfade at the join, so it is not endlessly new noise. On a phone the sound can stop when the screen locks. It cannot cancel other sounds in your room.
When you need the words, not the noise
This tool makes sound; ParrotNotes works with speech. If you sit through meetings, calls or lectures and want a record of what was said, the app records them, transcribes them and summarizes them.
Get ParrotNotes freeRelated tools
- Online Tone GeneratorPlay a pure tone at any frequency, or white, pink or brown noise, in your browser, and download it as a WAV file.Open the tool
- Decibel MeterMeasure how loud a room is with your device's microphone before you record: live dB estimate, peak and average, with a calibration offset.Open the tool
- Audio EqualizerAdjust the bass, mids and treble of an audio file with a band equalizer and presets, compare with the original, and download it. Nothing is uploaded.Open the tool
- Bass BoosterBoost the bass of a song or recording with a low-shelf filter and a simple equalizer, compare before and after, and download it as MP3 or WAV in your browser.Open the tool
- Volume BoosterMake a quiet recording louder in your browser: boost or normalize the volume without clipping and save it as MP3 or WAV.Open the tool
Noise Generator FAQ
Sources