Online Stopwatch
A fast, accurate stopwatch with laps, best/slowest lap highlights, fullscreen wall mode, optional voice lap announcements, and automatic session restore if you refresh the page.
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Shortcuts: Space start/pause · L lap · R reset · F fullscreen · W wall mode
Runs fully in your browser (no login). Your time and laps can survive refreshes if you accidentally reload.
Stopwatch FAQ
This stopwatch runs entirely in your browser. Use it for workouts, labs, classrooms, meetings, or any timing task where you need quick lap capture and a clear fullscreen display.
How do I start, pause, and reset the stopwatch?
Use the Start button to begin and Pause to stop. Press Reset to clear the time. Keyboard shortcuts: Space start/pause, R reset.
How do lap times work, and which lap is “best” or “slow”?
Press Lap (or the L key) to record a lap. The lap list highlights the fastest lap as “best” and the slowest lap as “slow” once you have at least two laps.
Does it keep running if I refresh or accidentally close the tab?
Yes. If the stopwatch is running, it periodically saves state and restores on reload. If it was paused, it restores the paused time and your saved laps.
What is fullscreen and “wall mode” used for?
Fullscreen makes the digits large. Wall mode hides UI for a clean display (ideal on a TV, projector, or across a room). Press F for fullscreen and W for wall mode.
Can it keep my screen awake, and can it speak laps?
In fullscreen, you can enable Keep awake on supported browsers to prevent the display from sleeping. Turn on Speak laps to announce lap number, lap time, and total time out loud.
Is this stopwatch free, and does it send my timing data anywhere?
It’s free to use and needs no account. Timing data (like elapsed time and laps) is stored locally in your browser only, so it can restore after refresh.