Key Features
Lap Timer with Best/Worst Highlight
Record unlimited lap splits without stopping the clock. Best and worst laps are automatically highlighted for quick analysis.
Millisecond Precision
Accurate to 1/10th of a second using the browser's high-resolution performance.now() API for reliable timing.
Fullscreen Mode
One-click fullscreen with large, readable digits — perfect for classroom projectors, meeting rooms, and race events.
Keyboard Shortcuts
Space to start/pause, L for lap, R for reset, F for fullscreen. Power users can operate the entire stopwatch without a mouse.
CSV Export
Download your complete lap history as a CSV file for analysis in Excel, Google Sheets, or any spreadsheet tool.
30 Languages
Available in 30 languages worldwide. Completely free with no tracking and no sign-up required.
Frequently Asked Questions
Click Start to begin timing. Click Lap to record split times. Click Pause to stop temporarily. Click Resume to continue. Click Reset to clear all data.
The stopwatch is accurate to one-tenth of a second (0.1s), using the browser's high-resolution performance.now() API.
Yes. All lap data is saved in your browser and persists across sessions. Click Export CSV to download a CSV file of your lap history.
Yes. Click the fullscreen button in the top-right corner or press the F key to enter fullscreen mode, ideal for classroom projectors or meeting screens.
Yes — Timer Stopwatch is completely free with no hidden costs and no premium tiers. We do not require user registration, email sign-up, or any form of payment. Every feature — lap timing, millisecond precision, fullscreen mode, CSV export, keyboard shortcuts, customizable colors, and all 30 language translations — is available to everyone at no cost.
Timer Stopwatch uses the browser’s high-resolution performance.now() API, which provides sub-millisecond precision in modern browsers. In practice, our stopwatch is accurate to 1/10th of a second — comparable to most digital physical stopwatches. For everyday use like workouts, classroom activities, cooking, and meetings, the accuracy is more than sufficient.
Click Start to begin. Click Pause to pause, Resume to continue. Click Lap to record a lap time — each lap appears in the Stopwatch History table with its timestamp. Click Reset to clear everything. Your data is automatically saved in your browser and restored on your next visit.
Click the settings icon in the top-right corner. You can show or hide milliseconds, add a repeating alarm, change the font size of the main display and lap display independently, and change text and background colors.
A stopwatch is useful for studying, work tracking, sports, cooking, or any activity that requires precise time measurement. Fullscreen mode is great for classroom projectors or meeting presentations.