Stopwatch & Countdown Timer
A stopwatch with lap recording that runs in a browser tab. Start, stop and record splits without installing an app or granting any permissions — useful for timeboxing work, timing a process, or recording intervals during practice.
Precision High-Speed Timekeeper
How it works
- 1
Press start to begin timing.
- 2
Record a lap whenever you want a split, without interrupting the running clock.
- 3
Pause and resume as needed; the elapsed total keeps accumulating.
- 4
Reset to clear both the clock and the recorded laps.
What people use it for
- Timeboxing focused work or a meeting segment.
- Timing rounds during exercise, practice or rehearsal.
- Measuring how long a manual process takes before automating it.
- Recording lap splits for repeated runs of the same task.
Supported formats & options
| Display | Elapsed time with sub-second precision |
|---|---|
| Laps | Unlimited recorded splits for the current session |
Key advantages & benefits
No install, no permissions
It runs in a tab. Nothing is installed and no camera, microphone or notification access is requested.
Lap splits
Record intervals while the clock keeps running, so you can compare rounds afterwards.
Readable at a distance
The display stays legible from across a desk or room, which is the point of a stopwatch.
Works offline once loaded
After the page has loaded, timing continues without a network connection.
Limits & things to know
- Browsers throttle timers in background tabs to save power. Keep the tab visible for the most accurate reading over long runs.
- The session is not saved. Refreshing or closing the tab clears the clock and every recorded lap.
- This is a stopwatch rather than an alarm: it does not raise a system notification when the tab is not in focus.
Troubleshooting
The time drifted while the tab was in the background
Background throttling is a browser power-saving behaviour. Keep the tab in the foreground, or on a second screen, for long timings.
Laps disappeared
Laps live only in the page. A refresh clears them — copy the splits out before reloading if you need to keep them.
Privacy & data handling
Timing runs entirely in the page using browser timers. Nothing is recorded, stored or transmitted, and no permissions are requested.
Online Stopwatch & Countdown Timer — Free, No Download
A free online stopwatch and countdown timer that runs in a browser tab, with lap times and an audible alert. No app to install, no account, and it keeps accurate time even if the tab is throttled in the background.
- Stopwatch with lap times — record split times for workouts, drills, presentations and process timing without losing the running total.
- Countdown timer with alert — set a duration for pomodoro sessions, cooking, exams or timed talks and get a clear sound when it expires.
- Accurate in a background tab — elapsed time is calculated from real timestamps rather than counted frames, so throttling does not make it drift.
- Full-screen friendly — large, legible digits that read clearly from across a room, classroom or gym.
- Free and instant — opens and starts in a second — no download, no permissions prompt, no account.
Timing a recording session? Pair it with the Screen Recorder, and use the Unit Converter when you need to convert the result between time units.
Frequently asked questions
Does the timer work if I switch tabs?
Yes! High-precision Web APIs ensure the timer continues accurately in the background.
Does the timer keep running if I switch tabs?
It keeps counting, but browsers throttle timers in background tabs to save power, which can introduce drift. Keep the tab visible for the most accurate reading over a long session.
Are my laps saved if I refresh?
No. The clock and the lap list live only in the page, so a refresh clears both. Copy the splits out before reloading if you need them.
Can it count down instead of up?
This is a stopwatch: it counts up from zero and records laps. It does not run a countdown or raise an alarm when the tab is in the background.
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