Productivity
Online Stopwatch & Timer
Stopwatch with laps + countdown timer. Millisecond precision, tab-title display, runs in your browser.
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A clean stopwatch + timer combo
Two modes in one tool. Stopwatch counts up — perfect for measuring how long something takes (workouts, chores, billable work). Timer counts down — perfect for cooking, workouts with set durations, or any "stop after X minutes" situation. Both use millisecond precision and continue running across tab switches.
Frequently Asked Questions
How accurate is the stopwatch?▾
We use performance.now() — the browser's high-resolution timer with sub-millisecond precision. The displayed value updates every ~50ms (smooth visual feedback). For Olympic-grade accuracy you need a hardware timer, but for everyday use this is more than enough.
Does the stopwatch keep running if I close the tab?▾
Yes — start time is saved to your browser. If you close the tab and reopen, the elapsed time is correctly restored. If you clear browser data or open in private mode, the saved state is lost.
What's the difference between stopwatch and timer?▾
Stopwatch counts UP from zero — useful for measuring how long something takes. Timer counts DOWN from a target — useful for "stop after X minutes" scenarios (cooking, workouts, deadlines). Pomodoro is a structured pattern of timers; we have a separate Pomodoro tool.
Why does the tab title show the time?▾
So you can see the running time at a glance even when you're on another tab. Useful for tracking work sessions, meetings, exercise, etc. without keeping the stopwatch tab in front.
How many laps can I record?▾
Unlimited. Each lap is timestamped with both elapsed-since-start and time-since-last-lap. The laps list is saved to localStorage so you can come back later.