PRODUCTIVITY FLAGSHIP
Free Online Timer & Stopwatch Online
Use a precise browser countdown timer or stopwatch with presets, lap tracking and a 25-minute focus timer preset.
By Shehzad Hussain — owner and editor of ExpTool, based in Multan, Pakistan. He builds and tests every tool on this site himself.
Countdown TimerOnline StopwatchPomodoro TimerTimer OnlineStopwatch Online
Interactive Online Timer & Stopwatch Workspace
Process your files or inputs directly in your browser. Many workflows run locally; features that need network data or a service are identified on their tool page.
At a glance
Online Timer & Stopwatch — Use a precise browser countdown timer or stopwatch with presets, lap tracking and a 25-minute focus timer preset.
Free for the core workflow, no account required. The tool runs in the browser and does not need to send the session data to ExpTool servers.
About Online Timer & Stopwatch
Use a precise browser countdown timer or stopwatch with presets, lap tracking and a 25-minute focus timer preset.
The timer uses elapsed browser clock time rather than simply counting rendered frames, reducing visible drift when the page is busy. The stopwatch records lap checkpoints and the countdown provides common focus and cooking presets. A straightforward count-up/count-down timer that keeps running in the tab. For focus work, pair it with a defined task — "25 minutes on the report" beats "25 minutes of work" because the finish line is concrete. Worked example — a 10-round interval session. Set work to 45 seconds and rest to 15 seconds, with 10 rounds. Each round is 45 + 15 = 60 seconds, so the whole session is 10 × 60 = 600 seconds, exactly 10 minutes. Of that, 450 seconds (7 minutes 30 seconds) is work and 150 seconds (2 minutes 30 seconds) is rest — the split tells you at a glance whether the session is mostly effort or mostly recovery. A second example uses the stopwatch. Three laps read 1:04.2, 2:07.8, and 3:11.5. The splits are 1:04.2 for lap one, 2:07.8 minus 1:04.2 = 1:03.6 for lap two, and 3:11.5 minus 2:07.8 = 1:03.7 for lap three — three laps within half a second of each other, which is exactly the kind of consistency a stopwatch is for. Start a 25-minute countdown at 14:02 and it ends at 14:27, because the timer reads elapsed time from the browser clock rather than ticking once per rendered frame; a busy tab that drops frames still ends on time. Table — common presets and what they are for: 3 minutes, steeping a cup of tea; 6 minutes, a soft-boiled egg; 10 minutes, a stretch break between meetings; 25 minutes, a Pomodoro focus block; 45 minutes, a school lesson or a training set; 60 minutes, a one-hour meeting or a roast resting before carving. Before / after — before: watching a phone clock and guessing when 25 minutes is up; after: a countdown started at 14:02 that rings at 14:27, with the remaining time read from the clock so a frozen animation cannot steal minutes. A common mistake is trusting a tab you closed: closing the tab ends the timer, so for anything that must ring — an oven, a medication dose — run the timer alongside a phone alarm, not instead of it. When not to use it: anything where a missed alarm has real consequences, such as switching off a stove or catching a flight; a browser tab is a convenience timer, not a safety device. Sources: MDN Web Docs, 'Window setTimeout() method' (accessed November 2026); MDN Web Docs, 'Page Visibility API' (accessed November 2026). Content last reviewed: November 2026.
Primary objective: Runs countdown and stopwatch sessions with presets, pause/reset controls and stopwatch laps.
Privacy assurance: The tool runs in the browser and does not need to send the session data to ExpTool servers.
How to Use Online Timer & Stopwatch
- Choose Countdown or Stopwatch mode.
- Set a duration or start the stopwatch.
- Pause by leaving the page running, record laps when needed, and reset when starting a new session.
- Choose Countdown for a fixed duration or Stopwatch when you want to measure how long something actually takes.
- Type the duration directly — 10:00 for ten minutes — or tap a preset such as 25:00 for a focus block.
- Switch the sound on before you start, and test it once at low volume so the alert is audible from across the room.
- In Stopwatch mode, press Lap at each checkpoint to capture split times instead of only the running total.
- Press Reset before the next session so a leftover duration from the last run does not silently carry over.
Key Use Cases & Applications
- Pomodoro focus sessions
- cooking and study timers
- sports and interval timing
- Timing focused work blocks with a visible countdown.
- A simple kitchen or exercise interval timer.
- Timing a 10-round interval workout: 45 seconds of work and 15 seconds of rest per round, 10 minutes total.
- Steeping tea for exactly 3 minutes or boiling an egg for 6, with an audible alert instead of clock-watching.
- Timing how long a meeting actually runs, lap by lap, to see which agenda item ate the hour.
- Pacing exam practice: 25 minutes per section, with the countdown visible so pacing stays honest.
Frequently Asked Questions
Does the timer work in the background?
Browser background throttling can affect display updates, but elapsed time is derived from the browser clock rather than incrementing one second per render.
Why is there no sound when the timer ends?
Check the sound toggle first — it must be switched on before you start — then the browser tab audio permission and your device volume; some browsers also block sound from background tabs until you return to them.
Can I record stopwatch laps?
Yes. Use Lap while the stopwatch is running to record checkpoints.
Does the timer keep running if I switch tabs?
Yes, it keeps counting. Browsers may throttle background tabs, so for critical timing keep the tab visible or use the audible alert.
Can I use it for cooking or workouts?
Absolutely — set the countdown, enable sound, and let it signal you. It is a general timer, not just a productivity tool.
Is there a Pomodoro preset?
Yes — the Pomodoro mode runs 25-minute focus blocks with 5-minute breaks automatically. See the dedicated Pomodoro timer for the full technique.
Why does the timer show a different remaining time when I come back to the tab?
Because it reads elapsed time from the browser clock, not from counting frames. If you left for 4 minutes 20 seconds, the countdown is 4 minutes 20 seconds shorter — the display only looked frozen while the tab was throttled in the background.
How accurate is a browser countdown over a full hour?
Within a second or two on a normal desktop, because the end time is fixed when you press start and the display is computed from the clock. The risk is not drift but interruption: a sleeping laptop or a closed tab stops the timer, so do not rely on it for anything time-critical.
Can I run a countdown and a stopwatch at the same time?
No — the tool runs one mode at a time. If you need both, open the timer in a second tab: one tab counts down the session, the other times the task inside it.
What happens if my laptop goes to sleep mid-countdown?
The countdown pauses with the machine and resumes from the elapsed clock time when it wakes, which usually means it has already expired. For an alarm that must survive sleep, use your phone or a dedicated alarm app.
Does the timer keep my screen awake?
No. The timer keeps counting while the screen sleeps on most desktops, but it cannot prevent the operating system from sleeping the device or throttling the tab, and the sound alert may be delayed on mobile browsers.