Precision Stopwatch

High-precision stopwatch with millisecond accuracy and split lap recording.

Processing Architecture: Client-Side (Processed locally in your web browser with zero server uploads)

How to Use Precision Stopwatch

  1. Step 1: Start Stopwatch

    Click Start or press the Spacebar.

  2. Step 2: Record Laps

    Click Lap to record individual split times.

  3. Step 3: Review & Export

    Inspect lap statistics (fastest, slowest, average) and copy data.

Key Features & Capabilities

  • Millisecond precision timing via requestAnimationFrame
  • Keyboard shortcut controls (Space = Start/Stop, L = Lap, R = Reset)
  • Highlights fastest and slowest laps automatically

Frequently Asked Questions

Is the timer accurate if I switch tabs?

Yes, the stopwatch calculates elapsed time using performance.now() timestamps rather than imprecise interval ticks.

Can I control the stopwatch with my keyboard?

Yes, press Spacebar to start/pause, 'L' to record a split lap, and 'R' to reset.

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