Focus & study timers
Press start for a full-screen 25-minute timer that counts down 25:00 and rings a loud alarm when it reaches zero. You can pause and resume it, reset it, and the countdown keeps running accurately even if you switch tabs or your screen dims. No sign-up, nothing to install.
Ready · 25-minute timer
Twenty-five minutes is the canonical Pomodoro work interval — one 'pomodoro' of single-tasking, followed by a short five-minute break. It is long enough to get genuinely absorbed in a piece of work but short enough that the finish line is always in sight, which is exactly why it has become the default focus length for students, writers, and developers the world over.
Francesco Cirillo created the Pomodoro Technique in the late 1980s as a university student, naming it after the tomato-shaped kitchen timer he used. The method is deliberately simple: choose one task, work on it for twenty-five uninterrupted minutes, then take a five-minute break, and after four such intervals take a longer break of fifteen to thirty minutes. The twenty-five-minute length is the heart of it. It is short enough that committing to it does not feel daunting, which lowers the barrier to starting — the hardest moment for any procrastinator. It is also short enough to defend: when a distraction arrives, it is easy to tell yourself you will deal with it in twenty-five minutes rather than now. And it builds in regular rest before fatigue sets in, so concentration stays sharp across a long day rather than collapsing after one heroic, unsustainable push. The technique works less because of anything magic about the number and more because it turns a vague, open-ended task into a sequence of small, finite, winnable rounds.
Most browser timers drift, because they count by accumulating small ticks, and browsers deliberately slow those ticks down in background tabs to save battery. This one is different: the moment you press start it records the exact wall-clock time the countdown should end, and every frame it simply measures how long is left until that fixed end time. If you switch tabs, lock your phone, or the tab is throttled, the remaining time is recomputed from the real clock the instant you come back, so a 25-minute timer is still a 25 minutes timer rather than however long the throttled ticks happened to add up to. On phones the page asks for a screen wake lock while the countdown is running, where the browser allows it, so the display does not sleep mid-count. The alarm is synthesised in the browser with the Web Audio API, which means there is no audio file to download and the chime is ready the moment you start.
Need a different length? These are the timers people most often reach for alongside a 25-minute timer:
Browse the full set of countdown timers, or switch tools: the Pomodoro timer loops work and break intervals automatically, the online stopwatch counts up with laps, the alarm clock rings at a specific time of day, and the countdown maker counts down to a future date you can share or embed.