Sleep Timer Online

Set how long until lights out and let it count down quietly in the background. When it reaches zero it alerts you with a gentle tone, and an optional fade eases the sound down near the end so nothing jolts you awake.

  • 100% free
  • No sign-up
  • No clutter or popups
  • Works offline
  • Accurate & distraction-free
Read the guide: How to Use a Sleep Timer

Sleep timer

20:00

How it works

  1. 1

    Choose how long

    Set the minutes until you want to wind down, or tap a preset like 20 or 45 minutes.

  2. 2

    Let it count down

    Start it and relax. The dimmed display keeps the glare low while the time ticks away.

  3. 3

    Drift off on the alert

    At zero a soft tone plays. Turn on fade and the last stretch eases down gradually instead of stopping sharply.

Great for

  • ✓ Winding down before bed
  • ✓ Capping a nap so it stays short
  • ✓ A reminder to stop scrolling and sleep
  • ✓ Timing relaxation or breathing sessions

No clutter, no popups, no waiting

This tool runs entirely in your browser, so it starts instantly and keeps working offline once the page has loaded. There is no sign-up, no popups fighting for your attention, and nothing is sent anywhere. Add it to your home screen and it opens like a real app.

Frequently asked questions

What does the fade option do?
With fade on, the alert tone eases in and out gently rather than starting at full volume, so it nudges you instead of jolting you. It is meant for winding down, where a soft cue suits the moment better than a sharp alarm.
Can this stop music or a video playing in another app?
It runs on its own and cannot reach into other apps, so it will not pause your music player or streaming app. It works as a gentle alert that your set time is up, which you can use as your cue to stop and sleep.
Will it keep counting if I dim or lock my screen?
The countdown is measured from a fixed end time, so it stays accurate whether the screen is dimmed or you switch away. To be sure the tone plays, keep the tab open, since some browsers limit audio in fully hidden or locked tabs.
Does it work offline?
Yes. Once the page has loaded it keeps running with no connection, because the whole tool runs in your browser. You can install it to your home screen and open it like an app.
Do I need an account, and is anything tracked?
No account and no sign-up. The tool runs on your own device, so there is nothing to log in to and your settings stay on your machine. No popups, no clutter.

More tools

Online Timer with AlarmSet a timer with a clear sound and visual alert when it ends.Countdown Timer OnlineCount down to a date or event in days, hours, minutes and seconds.Interval Timer for WorkoutsRun HIIT and circuit workouts with work, rest and round timing.Egg Timer OnlineBoil eggs perfectly with soft, medium and hard presets, or a custom time.Tabata Timer OnlineRun the classic 20/10 Tabata protocol with rounds and audio cues.Bomb Countdown TimerA dramatic countdown with a ticking fuse and an explosive finish.

More from the Hivly network

Free sister tools on our other sites.

Age CalculatorExact age in years, months and days, plus your next birthday.Citation GeneratorAPA, MLA, Chicago and Harvard references plus in-text citations.Length ConverterMetres, feet, miles, inches, km and more, instantly.