Multi-timer
Run several countdowns at the same time, each with its own name, and get a loud alarm as each one finishes. For the kitchen, the gym, the lab or a busy classroom.
No timers yet. Add one above or tap a preset; each starts as soon as it is added.
How the multi-timer works
Every timer runs independently against your device clock, so they stay accurate even when the tab is in the background. When one reaches zero the page rings with your chosen alarm sound and shows which timer finished; the others keep running. Timers are saved in this browser, so a reload does not lose them, and a timer that ends while the tab is closed is reported the moment you come back.
Need a single big countdown? Use the online timer. For work and rest cycles, the interval timer and Pomodoro timer are built for that.
Questions
Will the alarm ring if I close the tab or the laptop?
No. No website can ring after the browser is closed or the computer sleeps. Keep this tab open, plug in, and the clock keeps the screen awake for you. The Ready-to-ring check under the clock shows what is set up correctly.
Does it work on my phone?
Yes on Android while the tab is open (behind other tabs is fine). On iPhone the page must stay in the foreground because Safari does not let web pages play sound from the background. Add it to the Home Screen for a full-screen bedside clock.
Is it loud enough for heavy sleepers?
Pick Loud buzzer or Siren, set the volume slider to full, and switch on the sums-to-stop option in Settings so the alarm cannot be dismissed half asleep. The sunrise light brightens the screen before the alarm too.
Can I use my own sound?
Yes. In Settings, choose an MP3, WAV or OGG file. It is stored in this browser only and never uploaded. There are also 60 built-in sounds, from a twin-bell alarm clock and a rooster to an air horn and a music box, on the sounds page.
What do the sleep sounds do?
Rain, brown noise, white noise, fan and ocean are generated in the browser and play until the alarm, then fade out as it rings. They keep the tab active through the night.
Does it need an internet connection?
Only to load the page the first time. Alarms, sounds, the sleep calculator and the sunrise math all run on your device, and the page works offline once it has been opened.
Is anything stored or sent?
Alarms and settings are saved in your browser's local storage. Nothing is sent to a server, and there is no account.
How many timers can I run at once?
As many as you need; there is no fixed limit. Each shows its own countdown and progress bar.
Do all timers use the same sound?
They use the alarm sound selected in Settings. The finished timer's name is shown on the stop screen so you know which one rang.
Will a timer ring if the tab is in the background?
Yes on desktop and Android while the browser stays open. On iPhone keep the tab in the foreground, as with every web timer.