Stopwatch
| # | Split | Diff |
|---|
Shortcuts: focus widget then Space start/stop, L lap, R reset
How to Use the Online Stopwatch Freely
This stopwatch is lightweight and private — no install, no account. It works on all devices including desktop, tablet, and mobile.
Steps to use the stopwatch
Click Start.
Click Lap to record a lap time.
Click Stop to pause the clock.
Click Resume to continue.
Click Reset to clear the clock and all laps.
Shortcuts: Space = start/stop, L = lap, R = reset.
Lap table basics
Split shows the total time at that lap.
Diff shows the time since the previous lap.
The live row at the top updates while the clock runs.
The counter shows how many laps you captured.
Why use this stopwatch?
Accurate timing down to hundredths of a second
Lap tracking with automatic split and diff times
Keyboard-friendly for fast use without the mouse
Privacy-first — everything runs locally in your browser
Responsive design for phones, tablets, and computers
Pros and Cons
✅ Pros
Accurate to hundredths — perfect for workouts, sprints, study sessions, cooking
One-screen control with large, readable numbers
Lap tracking with split and difference times
Keyboard-friendly (Space/L/R shortcuts)
Private: runs locally in your browser
Works across desktop, tablet, and mobile
❌ Cons
Stopwatch resets if tab is closed or device sleeps
No reminders, export, or cloud sync
Frequently Asked Questions
Will it keep running if I switch tabs?
Yes. It keeps running while the page is open. You can move to another tab and return any time.
What happens if my device sleeps or I close the tab?
If the device sleeps or the tab closes, the stopwatch cannot keep time. Keep the tab open and the device awake for long runs.
What do Split and Diff mean?
Split is the total time when you pressed Lap. Diff is the gap from the previous lap to the current one. This helps you compare pace.
Is there a limit to the number of laps?
You can add many laps. The practical limit depends on your browser memory, but normal use is fine.
How do I export lap times?
Select the table with your mouse or touch, copy, and paste into a note or sheet. This gives you the lap number, split, and diff.
Can I resume after stopping?
Yes. Press Start again and it resumes from where you paused.
Does it work on mobile?
Yes. The layout is touch friendly and the buttons are easy to tap.