Everything runs in your browser and keeps counting from the real clock, so switching tabs never makes a timer drift. Press full screen to put the clock on a TV, projector or spare monitor.
Frequently asked questions
How accurate is this clock?
It shows your device clock, which is normally synchronised with internet time servers to within a fraction of a second.
Can I show the clock full screen?
Yes. Press the full screen button or the F key. The digits scale to fill the whole display.
Is TimerTab free?
Yes. Every clock, timer and alarm is free, with no account and no download. It works in any modern browser on desktop, phone or tablet.
Will it keep time if I switch tabs?
Yes. TimerTab counts from the real clock time instead of counting ticks, so it stays accurate when the tab is in the background and catches up instantly when you come back.
Does it work offline?
Yes. After your first visit the pages are cached on your device, so timers, the stopwatch and alarms keep working without an internet connection.