You're boiling pasta, timing an exercise interval, or trying to focus on a task for a set stretch of time. Rather than digging up a phone timer app or installing something new, a single browser tab can handle a countdown timer, a stopwatch, and a Pomodoro-style focus timer, all without an install or account.
What you can do with Dagochim's timer
- Countdown timer: quick-start buttons for 1, 3, 5, 10, 15, 25, 30 and 60 minutes, or type an exact hours/minutes/seconds value. You can add +10 seconds, +1 minute, or +5 minutes while it's already running.
- Stopwatch: tracks time to the hundredth of a second, with a lap button to record splits. The fastest and slowest laps are automatically highlighted for you.
- Pomodoro timer: automatically cycles through focus, short break, and long break. You set the focus length, break lengths, and how often a long break occurs.
- Fullscreen big digits: blow the countdown up to fill the whole screen so it's readable from across the room.
- 3 alarm sounds plus volume control: choose between a beep, a chime, or a soft tone, and preview any of them before committing.
How to use the timer
- Open the Online Timer tool.
- Pick Timer, Stopwatch, or Pomodoro mode at the top.
- For a countdown, click a quick-start preset or type hours/minutes/seconds directly.
- Press Start to begin the countdown. You can also press the spacebar to start or pause.
- When time is up, the alarm plays and the screen flashes red. Click "Stop alarm" or press Escape to silence it.
What the Pomodoro Technique actually is
The Pomodoro Technique is a time-management method devised by Francesco Cirillo in the late 1980s, named after the tomato-shaped ("pomodoro" in Italian) kitchen timer he originally used. The classic structure alternates 25 minutes of focused work with a 5-minute short break, and after every 4th focus session, takes a longer break of around 15 minutes before starting the cycle again. Dagochim's timer ships with exactly these defaults, but every number is adjustable — stretch focus sessions to 50 minutes, shorten breaks, or change how many sessions happen before a long break, to fit your own attention span. Turning on "Auto-continue" starts the next focus session automatically the instant a break ends, which is useful if you want to avoid the decision fatigue of manually restarting each cycle.
Why the countdown stays accurate even on a background tab
Most web-based timers are built by subtracting a second from a number roughly once per second, but browsers deliberately throttle that kind of repeated background-tab activity to save battery and CPU, so a naive implementation tends to drift and finish later than it should. Instead of tracking "how many seconds are left," Dagochim's timer calculates "the exact clock time this should finish at" the moment you start it, then works backward from that fixed target whenever it redraws the display. The alarm sound is scheduled on the browser's audio engine in advance, at the precise moment it needs to play, rather than being triggered by a background loop — so even if you're watching a video or chatting in another tab when time runs out, the alarm still fires at the correct second.
Picking settings for common use cases
For focused study or deep work, the default 25/5-minute Pomodoro split works well for most people starting out, but if you find 25 minutes interrupts you just as you're getting into flow, stretching focus sessions to 45-50 minutes with a slightly longer break (10 minutes) is a common adjustment experienced users make. For workouts, the plain countdown timer with the +10s/+1m quick-add buttons is useful for adjusting rest periods on the fly between sets without restarting. For cooking, where you're not looking at the screen the whole time, turning on the fullscreen mode plus a louder, more distinct alarm sound (the chime tends to carry better across a kitchen than the soft tone) helps you notice it from another room.
Are my settings kept private?
Yes. Your last-used duration, Pomodoro minute settings, alarm sound, volume, and notification preference are all saved only in this browser. Nothing is sent to a server, and none of it is visible from a different device.
Common problems and how to fix them
- I can't hear the alarm: check whether the browser tab itself is muted, or whether your device's system volume is at zero. The "Test sound" button lets you confirm the alarm works before you actually need it.
- Desktop notifications aren't appearing: make sure you granted notification permission in the browser. Without that permission, the on-screen popup won't appear while the tab is in the background, but the audio alarm will still play normally regardless.
- Fullscreen won't activate: many browsers require fullscreen to be triggered by a direct user click for security reasons, so if it silently fails, try clicking the fullscreen icon again directly rather than through a keyboard shortcut from an unrelated action.
- The stopwatch lap times look wrong: each lap time shown is the time elapsed since the previous lap, not since the stopwatch started — the cumulative total time is shown in a separate column for comparison.
Frequently asked questions
Does the alarm still ring on time if I'm on a different tab?
Yes. The timer calculates the exact clock time it should finish at when you start it, and the alarm sound is scheduled in advance on the audio engine, so it still plays at the right moment even though browsers slow down background tabs to save power. Closing the tab entirely, however, will stop it from ringing.
What durations can I set for the Pomodoro timer?
You can set the focus duration, short break, long break, and how many focus sessions happen before a long break, all as custom numbers. The defaults are 25 minutes focus, 5 minute short break, and a 15 minute long break every 4th session, matching the classic Pomodoro Technique structure devised by Francesco Cirillo.
Are my timer durations and settings saved anywhere?
Yes. Your last-used timer duration, Pomodoro minute settings, alarm sound and volume are all saved only in this browser. Nothing is sent to a server, and the settings won't appear on a different device or browser.