Try sounds
Build the room around the sleep
You can't quieten a street that is wide awake. You can stop your brain treating every bin lorry, door slam and school run as an event. Mix your own sound below, free in your browser with nothing to download. Want it on your phone? The Sleyp iOS app is coming soon with 22 free library sounds.
Paused
Sleep timer
Sound eases down over the final few minutes rather than cutting out, no re-alerting your brain just as you drop off. Pausing resets the countdown. Keep this page open: the timer and wake-up chime only run while it stays open in your browser.
Brown noise
Traffic rumble, engines, low bass
Pink noise
Voices, TVs, household sounds
White noise
High-pitched spikes, hiss, alarms
Heavy rain
Unpredictable bangs and door slams
Thunderstorm
Rain bed with rolling distant thunder
Ocean waves
Slow breathing surf, deeply calming
Forest canopy
Gusty leaves over outdoor voices
Babbling stream
Watery flutter over speech and chatter
Night wind
Low moaning gusts over droning noise
Campfire
Warm crackle, cosy indoor texture
Crickets
Gentle night-garden chirps
Cabin hum
Aircraft drone, steady and enveloping
Fan hum
Familiar, steady sleep texture
Build my blend
Three quick questions about your street and your sleep. Sleyp sets a starting mix and volume from your answers.
My mixes
Set any combination of the 13 sounds with the sliders, then save it as a mix, one tap to bring it back after every night shift. Mixes are saved in this browser on this device, so they won't follow you to another browser.
No saved mixes yet, set your sliders, name it, save it.
The Sleyp app
Want the full library?
The Sleyp iOS app is coming soon with 22 free library sounds and saved mixes, even without an account. Sleyp Plus adds AI mix generation and Discovery.
Which sound masks what?
Match the sound to the disturbance, not the other way round. The wrong colour at high volume is worse than the right colour played quietly.
Brown noise
Deepest rumble cover: traffic, engines, low bass through walls.
Pink noise
Sits over the speech frequencies: voices, TVs, next door's radio.
White noise
Full-spectrum hiss for high-pitched spikes and electrical whine.
Heavy rain
Natural variability that swallows sudden bangs and door slams.
Thunderstorm
Rain bed with slow rolling thunder, depth without jolts.
Ocean waves
Surf-paced swell that slows breathing and covers rumble.
Forest canopy
Gusty leaf rustle that softens outdoor voices and gardens.
Babbling stream
Watery flutter that blurs conversation and mid-band chatter.
Night wind
Low moaning gusts for droning, ever-present background noise.
Campfire
Warm crackle, a cosy texture that keeps bangs from standing out.
Crickets
Gentle night-garden chirps that signal 'night' to a day-sleeping brain.
Cabin hum
Aircraft drone, the enveloping steadiness people sleep to on flights.
Fan hum
The familiar steady texture many shift workers already sleep to.
Why masking beats earplugs alone
Daytime sleep fails on contrast, not volume. A quiet room with one sudden noise wakes you faster than a consistently noisy one, because your brain flags anything that stands out against the background. Earplugs lower everything but can't remove the spikes, a door slam still punches through.
Sleyp attacks the contrast instead. Raising the room's sound floor with a steady, predictable texture means the bin lorry, the school run and next door's dog no longer register as events. Layer it under moulded earplugs and blackout blinds and you've rebuilt night-time conditions at 11am.
Not sure where to start? Run the Noise Calibration Tool first, it rates your environment and prescribes the exact blend, volume strategy and physical defences to layer underneath.
Frequently asked questions
What can I do on this page?
Mix 13 sounds with simple sliders, from brown, pink and white noise to rain, ocean waves and fans, to cover traffic, neighbours and deliveries while you sleep. Add a sleep timer that fades out, and save the mixes you like. It is free and there is nothing to download.
Is it free?
Yes. All 13 sounds, the sleep timer, the wake-up chime, the three-question blend and saved mixes are free to use in your browser. You don't need an account.
Can I save my own mix?
Yes. Set the sliders, name the mix and save it. Mixes are saved in this browser on this device, so they won't follow you to another browser or phone, and clearing your browser data removes them. You don't need an account to save a mix.
Which sound is best for sleeping after a night shift?
Start with brown noise if traffic rumble is your problem, pink noise for voices and household sounds, and add heavy rain or ocean waves for unpredictable bangs. The three-question blend can set a starting mix for you.
Is there a sleep timer and a wake-up chime?
Yes. The sleep timer fades your sound out gently over the final minutes at 30, 60 or 90 minutes, or any length from 5 minutes to 12 hours. Turn on the wake-up chime and a soft tone builds over a full minute when the timer ends, so you surface gradually instead of being jolted awake before a shift. Keep this page open in your browser: the timer and chime only run while it stays open.
How are these sounds different from the Sleyp app?
This page generates its 13 sounds live in your browser. The Sleyp iOS app, coming soon, has its own library of 22 sounds, all free to play, and saved mixes without an account. The app's sounds don't play on this page, and sounds with similar names are not identical. Sleyp Plus adds AI mix generation and Discovery in the app.
How does noise masking actually work?
Masking raises your room's steady background sound floor so individual noises (a door slam, a bin lorry, a school run) no longer stand out sharply against silence. It's the contrast that wakes you, not the volume. A consistent sound floor removes the contrast.