Online Stopwatch & Countdown Timer – Free Browser Tool
A free online stopwatch and countdown timer. Use the stopwatch to measure elapsed time with lap support, or set a countdown timer for cooking, studying, workouts and more. Works in any browser, no app needed.
Features
- Stopwatch — start, pause, resume, lap and reset with precise centisecond display
- Lap timer — record multiple lap times for sports and fitness tracking
- Countdown timer — set hours, minutes and seconds for any duration
- Alert on completion — countdown notifies when time is up
Common Timer Uses
| Activity | Duration |
|---|
| Pomodoro work session | 25 minutes |
| Tea / coffee steeping | 3–5 minutes |
| HIIT workout round | 20–45 seconds |
| Presentation practice | 5–20 minutes |
| Exam question time | 1–2 minutes each |
💡 The Pomodoro Technique: work for 25 minutes, take a 5-minute break, repeat 4 times, then take a 15–30 minute break. Use the countdown timer to manage each session.
Frequently Asked Questions
Does the timer work when I switch tabs?Yes. The timer uses JavaScript intervals that continue running even when the tab is in the background. However, some browsers throttle background tabs — keep the tab visible for precise timing.
How accurate is this stopwatch?The stopwatch updates every 10 milliseconds (centisecond precision), making it accurate enough for most uses. For professional sports timing, use a dedicated hardware stopwatch.
Can I use this as a Pomodoro timer?Yes — set the countdown to 25:00 for your work session and 5:00 for breaks. The tool alerts you when time is up.