Free online stopwatch — works on any device. Press Space to start/pause · L to record a lap · R to reset
Tap Start · Lap · Reset
🏋️ Workouts
🍳 Cooking
📚 Studying
🏃 Running
🧘 Meditation
🎮 Gaming
✓ No sign-up
✓ No download
Free Online Stopwatch — Millisecond Precision, No Download
StopwatchOnline is a free, browser-based stopwatch and lap timer that works instantly on any device. No app, no sign-up, no permissions — just open the page and start timing. Whether you are running a meeting, timing a gym set, tracking training intervals, timing a school quiz, measuring a yoga session, recording exercise circuits, or running a testing window, this tool gives you reliable millisecond-accurate results right in your browser.
What is it used for?
💼 MeetingsKeep presentations, stand-up meetings, and timed agendas on schedule. Hit Lap to record each agenda item without stopping the clock.
🏋️ Gym & TrainingTrack rest intervals between gym sets, time HIIT training rounds, or measure lap splits for running, swimming, or cycling.
🧘 Yoga & ExerciseTime yoga flows, exercise circuits, and cool-down stretches without glancing at your phone every few seconds.
🎓 School & TestingRun timed school quizzes, testing windows, or classroom drills. Display it fullscreen on a projector for the whole class to see.
🏃 Sports & FitnessRecord lap times for running, swimming, or cycling. Hit the Lap button to capture each split without stopping the clock.
🎤 Presentations & SpeechesPractice speeches to hit your target time. Lap between sections to check pacing.
Frequently Asked Questions
Is StopwatchOnline free?Yes — completely free, forever. No sign-up, no download, no ads interrupting your session.
Does it work on mobile?Yes. It is fully responsive and works on any smartphone or tablet browser without installing anything.
How do I record a lap time?Click the Lap button while the stopwatch is running, or press the L key on a keyboard. Each lap shows the individual split and cumulative total.
How accurate is it?It uses the browser's performance.now() high-resolution API for millisecond-level accuracy.
Does it keep running if I switch tabs?Yes. It tracks wall-clock time, so the count stays accurate even if you minimise the tab.
Can I run multiple timers at once?Yes — switch to the Timers tab to run as many simultaneous countdowns as you need.
Does it work offline?Once the page loads, it works fully offline thanks to a built-in service worker.