Online Timer
Count down any duration — with a fullscreen mode made for classroom and meeting-room screens.
05:00
Free — no install, no sign-up
How to use
- Enter minutes and seconds, then hit Start.
- Use Fullscreen for a huge display — the tab title shows the countdown too.
- The alarm rings when time's up; hit 'Stop alarm' to silence it.
Frequently asked questions
Is it accurate in a background tab?+
Yes. The countdown is anchored to the wall-clock end time rather than accumulated ticks, so browser tab throttling never makes it drift.
How does fullscreen work?+
Hit the Fullscreen button and the countdown fills the whole screen — perfect for classroom TVs and projectors, presentation practice and exam timing. Press ESC to exit.
I don't hear the alarm.+
Browsers only allow sound after you've interacted with the page. Pressing Start enables it automatically, so if you started the timer normally the alarm will ring. Also check your device volume and mute switch.
What if my screen turns off?+
While running, the page requests a screen Wake Lock. Support varies by device and browser, so for critical timers keep the screen on.
Can I start a common duration in one click?+
Yes — the quick-start links below open preset pages from 1 minute to 2 hours with the time already set. Bookmark your favorite for one-click timing.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Guide
Where a web timer shines
A browser timer earns its keep whenever pulling out your phone is awkward: activity countdowns on a classroom screen, focus sessions at your work PC, timing presentation or interview practice, and cooking along to a recipe on your monitor.
Unlike a phone timer, the display is big, it doesn't get buried under app notifications, and everyone in the room sees the same clock.
Why it stays accurate
Naive web timers subtract one second per tick and drift by minutes in background tabs. This one fixes the end time the moment you press Start and always displays the difference from the actual clock — leave the tab alone as long as you like, it won't drift.