About SleepByNoise
A free, high-quality noise player for sleep, focus, and calm — made in the browser, with no account and no ads.
What we make
SleepByNoise plays the seven colors of noise — brown, white, pink, green, blue, violet, and grey — each with its own character, from the deep brown rumble that soothes light sleepers to the bright hiss that masks a noisy room. Around the player sits a small set of tools (a full noise generator and a browser sound machine) and plain-language guides that explain which sound fits which need.
How it works
The sound is synthesized in real time in your browser using the Web Audio API. Nothing is streamed or downloaded, so it never loops or repeats, it uses almost no data, and it keeps playing even if your connection drops. A tone control, gentle volume waves, and a sleep timer let you shape the sound to the moment — warmer for sleep, brighter for focus, fading out on a schedule.
What we believe
Good sound should be free and effortless. The web player needs no sign-up, shows no ads, and never puts the core experience behind a paywall. We care about audio quality — proper filtering, no harsh high end, no fatiguing artifacts — and about being genuinely useful rather than merely findable. Every guide is written to answer a real question, not to fill a page.
Where we're going
SleepByNoise is growing into a small platform: the free web player, a premium mobile app on the way (for reliable background playback and richer mixes), and a steadily expanding library of guides. If you'd like to hear when the app launches, you can join the waitlist.
Who it's for
Anyone who rests, focuses, or unwinds more easily with steady sound — light sleepers, students and deep-work professionals, people masking tinnitus, parents settling a baby, and anyone drowning out a noisy street or office. Start by exploring the colors of noise or reach us on the contact page.