SmartClock

Free · one click · drift-proof

30 minute timer

Preloaded to 30 minutes. Press Start and go. The display shows when it will finish, and the chime is impossible to miss.

30:00

Press Space to start / pause

What people set 30 minute timers for

Half an hour is the default unit of calendars and ovens alike. As a working block it sits just past the point where most people stop noticing the timer at all, which is usually the sign it is doing its job.

Need a different length? The countdown timer takes any duration up to 12 hours, and the pomodoro timer handles work and break cycles for you.

Frequently asked questions

How do I start the 30 minute timer?
The timer loads preset to 30 minutes — press Start (or the Space bar) and it counts down immediately, showing the exact wall-clock time it will finish.
Will it still ring if I switch tabs?
Yes. The deadline is anchored to your system clock rather than counted in ticks, so browser throttling can't delay it. The remaining time also shows in the tab title.
Can I change the duration?
Yes — presets from 1 to 60 minutes are one click away, and the custom field takes anything up to 12 hours.