Image Tools
Stopwatch
Check lap times and splits with millisecond-level canvas timers. Fully offline and secure inside your browser.
What is Stopwatch?
The Online Stopwatch is a free timer utility to track elapsed time. Record laps, track workout splits, and measure durations offline.
How Does Stopwatch Work?
It tracks elapsed milliseconds using window.performance.now() and updates the display using local JavaScript requestAnimationFrame intervals.
How to Use Stopwatch — Step by Step
- Click 'Start' to launch the stopwatch.
- Use the 'Lap' button to log split times.
- Click 'Pause' to freeze the timer, and 'Reset' to clear all logs.
Key Benefits
- Millisecond Accuracy: High-precision timing matching native stopwatch applications.
- Lap Split Log: Record and compare multiple lap splits.
- Zero Server Lag: Works entirely local, preventing timer shifts.
Who Uses Stopwatch?
- Work Timing: Keep track of work sessions and task durations.
- Workouts: Log run times and exercise sets.
Tips & Best Practices
- Use keyboard shortcuts (spacebar) to start, pause, and log laps quickly.
- The stopwatch runs in the background, but keep the tab open to prevent timers from pausing.
Common Mistakes to Avoid
- Closing the browser tab, which resets the stopwatch and logs.
- Assuming it tracks absolute time when the device is asleep.
Stopwatch — Frequently Asked Questions
It uses the high-precision browser performance API, providing millisecond-accurate timing.
You can copy the lap list directly from the screen to save splits.