A countdown timer with quick presets, the remaining time in the tab title so you can see it from another window, and an audible chime at zero. Plus a stopwatch with laps, accurate to the centisecond.
Both are built on timestamp arithmetic rather than an interval counter, so they don't drift when the browser throttles background tabs — a surprisingly common failure in online timers, where a five-minute timer quietly becomes five minutes and forty seconds because the tab wasn't in focus.
All time tools
- Time Calculator — Add and subtract hours and minutes, or measure the gap between two times.
- Online Timer — A countdown timer with presets, tab-title countdown and a chime.
- Stopwatch — Drift-free stopwatch with laps, accurate to the centisecond.
Frequently asked questions
Will the timer keep running if I switch tabs?
Yes. It calculates remaining time from a fixed end timestamp instead of counting down ticks, so background throttling can't make it lose time. The countdown also appears in the tab title, so you can keep an eye on it from another window.
Will it work with no internet connection?
Once the page has loaded, yes — there's no server involved in keeping time. The alarm sound is generated in the browser rather than fetched.
Is there a sound when the timer finishes?
Yes, a chime plays at zero. Browsers block audio until you've interacted with the page, so starting the timer yourself is enough to enable it — a timer set and left without any click may finish silently.