How to use
- 1Pick a tab: Stopwatch, Timer or Alarm.
- 2Stopwatch: press Space to start and stop, L to record a lap, R to reset.
- 3Timer: choose 1, 3, 5, 10 or 25 minutes, Pomodoro, or a custom hours/minutes/seconds time.
- 4Alarm: set a time and an optional label, test the sound, and keep the tab open.
Stopwatch with laps and splits
The stopwatch shows hundredths of a second and stays accurate even when the tab is in the background, because it measures elapsed time from a high-resolution clock instead of counting ticks. Each lap records the lap time and the cumulative split; once you have three or more laps, the fastest and slowest are tagged. Copy the lap table or download it as a CSV file (lap number, lap time, split) to open in a spreadsheet — handy for running intervals, swim sets or timing presentations.
Countdown timer and Pomodoro
Presets cover 1, 3, 5, 10 and 25 minutes, and the custom field accepts up to 99 hours. The remaining time also appears in the browser tab title, so you can keep an eye on it from another tab, and a progress bar shows how much is left. Pomodoro mode runs 25-minute focus blocks with 5-minute short breaks and a 15-minute long break after every fourth block, switching automatically with a beep at each change. When a normal timer ends, a beep repeats for up to 30 seconds or until you stop it.
Alarm clock — and its limits
Set an alarm time and an optional label; if that time has already passed today, the alarm is set for tomorrow, and the status line counts down the time left. The sound is generated in the browser with the Web Audio API, so there is no file to load — use “Test sound” to check your volume first. Like every web-based alarm, it only rings while this tab stays open and the computer is awake, so for waking up in the morning use your phone’s clock app.
Frequently asked questions
Does the timer keep running in a background tab?
Yes. It compares against the system clock rather than counting seconds, so the time stays correct. Browsers may delay the beep by a moment in background tabs, so keep the tab open.
What are the keyboard shortcuts?
Space starts and stops the stopwatch or timer (and silences a ringing alarm), L records a lap and R resets. Shortcuts are ignored while you are typing in a field.
How long is a Pomodoro?
The classic technique uses 25 minutes of focused work followed by a 5-minute break, with a longer break after four rounds. This timer uses 25, 5 and 15 minutes.
Can I show the timer fullscreen?
Yes. The Fullscreen button enlarges the display so it can be read across a room — useful in classrooms, gyms and meetings.
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