Two tools in one page: a countdown that counts down to an alarm, and a stopwatch that counts up from zero. Switch between them in Settings — no separate app, no account, nothing to install.
No app to install and no account — if you're already presenting or streaming from a laptop, it's another browser tab away instead of a reason to switch to your phone, and there's no ad breaking up the countdown mid-session.
A plain duration timer for anything with a hard stop — a timed test, a reading block, a meeting agenda item — without the Pomodoro structure of rounds and breaks.
Punch in minutes and seconds for a rest period, a cook time, or a stretch hold, and the alarm tells you when it's done so you don't have to watch the screen.
Switch to Stopwatch when you don't have a duration to set — just want to know how long a task, a call, or a workout actually took.
Four steps, whichever mode you need.
Countdown and Stopwatch both live under Settings → Mode — switching resets the display, and your last duration is remembered for next time.
In Countdown mode, enter hours, minutes, and seconds — up to 99 hours — while the timer is paused.
Hit play and walk away. When a countdown hits zero it plays an alarm automatically, unless you've turned Alarm Sound off.
Fullscreen clears the browser chrome for stream or presentation use; Keep Screen On stops the display from dimming mid-session.
What you're actually getting, feature by feature.
One Mode toggle in Settings switches between counting down to zero and counting up from zero — no separate page or URL.
Set hours, minutes, and seconds independently for a countdown up to 99 hours.
A short alarm tone plays automatically when a countdown reaches zero — or turn it off for a silent timer.
Clear the browser tab away for a distraction-free, presentation-ready display.
The Wake Lock API stops the screen from dimming or sleeping partway through a long countdown.
Pick from the same LED color set as the rest of the site's clocks, saved locally for next time.
The questions that come up most about this tool.
Yes — open Settings and switch Mode from Countdown to Stopwatch. It counts up from zero and keeps running until you stop it; it's the same page, not a separate tool.
Yes. Set a countdown, go fullscreen, and the display works as a visible on-screen timer for a talk, a slide, or an OBS browser source — no plugin or separate app needed.
Not this one — it tracks total elapsed time only. For lap splits, use the dedicated Stopwatch page instead.
Yes, the countdown or stopwatch keeps running in a background tab. Turn on Keep Screen On if you also need the display to stay lit and visible.
This is a plain single-duration timer or stopwatch. The Pomodoro Timer adds structure on top — repeating focus and break rounds with its own chime sounds.
Need lap times, not just elapsed time? See the dedicated Online Stopwatch. Need repeating focus and break rounds instead of a single duration? See the Pomodoro Timer. Need to wake up at a specific time of day instead of after a duration? See the Online Alarm Clock.