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 tracking a workout, timing a speech, recording split times in a race, or running a classroom drill, this tool gives you reliable millisecond-accurate results right in your browser.
What is it used for?
🏃 Sports & FitnessTrack lap times for running, swimming, cycling, or interval training. Hit the Lap button to record each split without stopping the clock.
🍳 Cooking & KitchenTime boiling eggs, steeping tea, or resting meat — then check it without unlocking your phone.
📚 Study & WorkMeasure how long tasks actually take. Use it alongside our Pomodoro Timer for structured focus sessions with built-in breaks.
🎓 Classroom & TeachingRun timed quizzes, reading exercises, or group activities. Display it fullscreen on a projector for the whole class to see.
🎤 Presentations & SpeechesPractice speeches or presentations to hit your target time. Lap between sections to check your 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.