How to Use the Online Stopwatch & Timer
Whether you need to time a sprint, track a study session, or count down to a perfectly cooked meal, our free online stopwatch and countdown timer has you covered — no app download, no sign-up required.
Step-by-Step Instructions
- Choose your mode by clicking the Stopwatch or Countdown Timer tab at the top.
- Stopwatch: Press Start to begin timing. Hit Lap at any point to record a split without stopping the clock.
- Countdown Timer: Enter your desired hours, minutes, and seconds, then press Start.
- Press Pause to freeze the display and Start again to resume from where you left off.
- Press Reset to clear everything and start fresh.
- When the countdown reaches zero, an audio alert plays automatically to notify you.
Use Cases
🏃 Sports & Fitness Timing
Track lap times for running, swimming, or cycling. The lap feature records each split alongside the total elapsed time so you can review your performance after the session.
🍳 Cooking & Kitchen Timers
Set a countdown for boiling eggs, baking, or marinating. The audio alert ensures you never overcook again, even when you step away from the screen.
📚 Study & Pomodoro Sessions
Use the countdown timer for focused 25-minute Pomodoro work blocks or the stopwatch to track how long you spend on each subject.
🎤 Presentations & Public Speaking
Keep your talk on schedule by running the stopwatch during rehearsals or setting a countdown for your allotted speaking time.
Key Features
- High-precision display — time shown in HH:MM:SS.ms format, updating every 50 ms.
- Lap recording — capture unlimited split times without interrupting the stopwatch.
- Audio alert — Web Audio API tone plays when the countdown hits zero.
- Pause & resume — both modes support pausing and continuing from the exact same point.
- Zero-install — runs entirely in your browser; no app, plugin, or account needed.
- Mobile-friendly — responsive layout works on phones, tablets, and desktops.