Online Timer
Set a countdown in hours, minutes and seconds. It runs in your browser and sounds an alarm when it reaches zero.
Ready
Shortcuts: Space start or pause, R reset, F fullscreen, M mute
Popular timers
One-click countdowns, each on its own page so you can bookmark or share it.
All timers
How this timer keeps time
Most browser timers count down by subtracting a second at a time, which quietly breaks the moment you switch tabs: browsers throttle background pages to save battery, and the countdown falls behind. This one records the exact clock time your countdown will end and measures against it, so switching tabs, locking your phone or refreshing the page does not cost you a second.
Timers are also per tab. Open the site twice and you get two independent countdowns, which is what you want when one is for the oven and the other is for a meeting. If you need to count up rather than down, the online stopwatch records lap times too, and the online clock just shows the current time. For something weeks away rather than minutes, use the countdown timer.