Online noise generator
The noise generator.
White, pink, brown and blue noise in one place — click-free, looping, with a brightness control and a sleep timer.
Full, bright hiss — equal energy at every frequency.
Noise colours
About the online noise generator
A noise generator plays a steady, broadband sound instead of a single musical note. This online noise generator makes four of them — white, pink, brown and blue — right in your browser, with nothing to install and no limit on how long it runs. Each colour describes how the sound’s energy is spread across frequencies, from the bright, even hiss of white to the deep rumble of brown.
White noise is the most familiar — an equal mix of every frequency at roughly the same level, which is what makes it sound so smooth and even. Pink and brown noise keep those frequencies but roll off the treble for a progressively softer, deeper character. You can switch between all four in a tap, and the brightness control nudges the tone warmer or brighter — a small adjustment that changes how harsh or mellow the noise feels more than you’d expect.
The sound loops seamlessly, so it never cuts or clicks, and there’s a sleep timer: set it and the noise fades out and stops on its own after the time you choose. That way you can start it as you settle down and not worry about a tab left hissing all night. People mostly use noise to cover distractions and background sound; whether it suits you is personal, so try the colours and keep whatever works.
Want to go straight to one colour? Open the dedicatedwhite noise generator,pink noise generatororbrown noise generator — each opens preset and ready to play, and you can come back here any time to compare them side by side.
Noise generator FAQ
What are the different noise colours?
They describe how sound energy is spread across frequencies. White has equal energy everywhere (bright). Pink lowers the highs for a softer sound. Brown lowers them further for a deep rumble. Blue does the opposite of pink — a thin, airy hiss.
Which noise colour is best?
There is no single best — it depends on what you are doing and what you like. White is strongest at masking sudden sounds; pink and brown are softer and often preferred for relaxation. The quickest way to choose is to switch between them and listen.
Does it loop or stop on its own?
It loops continuously for as long as you want. If you would like it to stop by itself, set the sleep timer and it will fade out and stop after the time you choose.
Is it really free?
Yes — free, no account, nothing to install. The sound is generated in your browser and keeps playing without any further downloads.