Free Sleep Sound Tools

Short answer

Ten free tools that work in your browser, with no signup. Play noise with the sound machine or the fan noise generator, find your colour with the noise colour test, and help little ones sleep with the baby sound machine, the baby sleep calculator and the OK-to-wake clock.

Noise and Sleep Sound Tools

Online Sound MachineBrown, pink, white and green noise, a fan and ocean waves, with a sleep timer.Fan Noise GeneratorBox fan, ceiling fan, desk fan or air conditioner, with speed and a timer.Noise Colour TestTwo questions and a listening test to find your noise colour.Brown Noise GeneratorPlay brown noise in your browser. Nothing to download.

Baby and Toddler Tools

Baby Sound MachineWhite noise, shush, heartbeat and more, with a timer and a night light.Baby Sleep CalculatorA bedtime for your baby or toddler, from the sleep hours by age.OK-to-Wake ClockA moon for “stay in bed”, a sun for “time to get up”.

Sleep and Focus Tools

Sleep CalculatorThe best time to go to bed or wake up, in 90-minute sleep cycles.Decibel MeterCheck how loud your room is, and which noise colour covers it best.Pomodoro TimerFocus in 25-minute rounds, with brown noise built in.

About These Tools

Every tool runs in your browser. There is no account, no email and nothing to install. The tools do their work on your device and send nothing to us.

We make the BRW app, a brown noise app for Android and iPhone. The tools are free because they help with the same problems as the app: falling asleep, staying asleep in a noisy room, and focusing.

Frequently Asked Questions

Are the tools really free?

Yes. All the tools are free, with no account. The sound on this site plays for up to 30 minutes a day; the tools themselves have no limit.

Do the tools work on a phone?

Yes. They work in any current browser on a phone, tablet or computer.