Stopwatch

What this tool does

This is a precise stopwatch that counts upward from zero, showing minutes, seconds, and hundredths of a second in a large, easy-to-read display. You start and pause it with a button or the keyboard, and a Lap button records the moment you press it without stopping the clock. Each lap appears in a list with two figures: the split (how long that lap took on its own) and the total (the full elapsed time when the lap was recorded). When you have two or more laps, the fastest and slowest splits are marked, making it easy to spot your best and worst stretches.

The timing is built to stay honest. Instead of adding up timer ticks — which drift and are slowed down by the browser in background tabs — the stopwatch records a start timestamp and measures elapsed time against the live system clock. The result is an accurate reading whether the tab is in front of you or hidden behind other windows.

Use cases

A stopwatch is one of those small tools that turns out to be useful constantly. Time interval workouts and rest periods between sets. Measure how long a chore, a commute, or a meeting actually takes so your planning is based on real numbers. Run study sprints and see how long you can hold focus. Time cooking steps that need a watchful eye. The lap feature is what makes it more than a plain clock: lap each rep, each lap of a track, or each phase of a process, then read back the splits to see where time went.

Because the fastest and slowest splits are highlighted, the lap list doubles as a quick performance check — handy for training, drills, or any repeated task where consistency matters.

How to use it

1. Press Start, or tap the Space bar, to begin timing.
2. While it runs, press Lap or the L key to record a lap. The clock keeps running; the lap is added to the list with its split and total.
3. Press Pause (or Space) to stop the clock; press it again to resume from where you left off.
4. Press Reset to clear the elapsed time and the entire lap list.
5. Use Copy laps to copy the full lap list as text, ready to paste into a note or spreadsheet. The sound toggle turns the lap beep on or off.

Tips

Learn the keyboard shortcuts — Space to start and pause, L to lap. They let you time something with your eyes on the activity rather than the screen, which is exactly what you want during a workout or a hands-on task. The lap beep reinforces this: you hear the confirmation without looking.

Record laps generously. Each one is cheap and the list is easy to scan afterwards, so lapping every rep or every stage gives you a detailed breakdown to review later. The fastest and slowest splits are highlighted automatically, which turns a long lap list into an instant read on your consistency — useful for training drills, sprint repeats, or any task you do the same way each time.

When you are done, copy the laps out before resetting if you want to keep them — a reset clears the list permanently, and there is no undo. Pasting the copied laps into a spreadsheet lets you chart them or compare sessions over time. Pause and resume as often as you like; the stopwatch picks up exactly where it left off, so you can time a task that has genuine interruptions without distorting the total. Everything runs locally in this browser, so nothing you time is ever uploaded, there is no account to create, and you can leave the tab open in the background without losing accuracy.