Online stopwatch, timer & countdown

The stopwatch measures to the hundredth of a second. When you start it, it records your browser's current time; the displayed time is always “now minus start” plus time from earlier runs. Because it uses timestamps rather than a counter, it doesn't fall behind when the browser throttles a tab. Start and pause with “Start” or the space bar, record a lap with L and reset with R. The display truncates rather than rounds: after 12.349 seconds, it shows 00:12.34. The countdown, by contrast, rounds up to whole seconds so 00:00 appears only when time is truly up.

Switch to “Countdown”, leave “Duration (Timer)” selected, and choose a preset under “Quick Select”: 1, 5, 10, 15, 30, or 60 minutes. For other durations, enter hours, minutes, and seconds—for example, 0 hours and 45 minutes. “Start” or the space bar starts the timer; an alert sounds when it ends. Below the tool, you’ll find links for 1, 2, 3, 5, 10, 15, 20, 30, 45, and 60 minutes that open with the timer already set. Use “Copy settings as link” to bookmark your own timer.

A stopwatch counts up from zero and measures how long something takes, with lap times for intermediate results. A timer counts down a set duration and alerts you at the end, for example after 10 minutes. A countdown counts down to a specific moment, such as Christmas Eve. This tool covers all three: a stopwatch, a duration countdown (the classic timer), and a countdown to a date and time. It also includes a Pomodoro timer that alternates between focus and breaks.

Press “Lap” or the L key while the stopwatch is running. Lap time is the time since the previous lap; total time keeps running. Laps recorded at 12.30, 25.40, 37.00 and 49.80 seconds produce lap times of 12.30, 13.10, 11.60 and 12.80 seconds: the fastest is lap 3 at 11.60, the slowest is lap 2 at 13.10, and the average is 12.45 seconds. Fastest and slowest laps are shown once you've recorded at least two. “Copy as text” puts one line per lap on your clipboard. “Download as CSV” saves a semicolon-separated table you can open in Excel or Google Sheets, including lap and total times in milliseconds.

Switch to “Countdown”, choose “Date and time”, enter the date and time, then choose the time zone in which that time applies. The countdown starts immediately and shows the time remaining from now in days, hours, minutes and seconds. The tool follows the time zone's rules, including daylight saving time: a target of 24.12.2026 at 18:00 in Berlin is 79 days and 7 hours away from 6 October 2026 at 12:00, because the clocks go back one hour on 25 October. Use “Copy settings as link” to share the target; ready-made links for Christmas Eve and New Year's Day are below the tool. The tool doesn't calculate the days between two dates of your choice; it always counts down from now to the target.

Yes, it keeps running. The countdown and Pomodoro timer have a fixed end time, while the stopwatch has a start time, and the display calculates from those. So the time is immediately correct even after minutes in the background. The alert sounds at the end time if you've clicked the page at least once, since browsers only allow sound after a click. If you hear nothing, check that “Sound alert at end” is selected and the tab isn't muted, then test your device with “Test sound”. You can also allow a notification at the end. If your computer is asleep or your smartphone is locked, the browser won't run scripts, so the sound will play only after it wakes up.

With the Pomodoro technique, you work in fixed blocks: 25 minutes of focus, a 5-minute break and, after four blocks, a 15-minute long break. That's the default setting. One cycle takes 130 minutes: 100 minutes of focus and 30 minutes of breaks. You can change the focus time (1 to 180 minutes), short and long breaks, and the number of rounds before a long break, or choose a preset: 25 / 5, 50 / 10 or 90 / 20. Phases switch automatically, with different sounds announcing focus and breaks.

Yes. “Open fullscreen” or the F key hides everything except the large digits, for example on a classroom projector, a tablet during sports or a TV in a meeting. This works for the stopwatch, countdown and Pomodoro timer. In fullscreen, use the space bar (start/pause), L (lap), R (reset) and Esc (close). For a stream, choose “Transparent (OBS)” under “Background”, click “Copy overlay link” and add the link to OBS as a browser source under “URL”, for example at a size of 800 × 300. You choose the label and digit color. With “Start immediately in overlay link”, the timer starts as soon as the link loads.

No. The tool is free, requires no sign-up and saves nothing on our servers. It runs entirely in your browser; lap times and running timers are lost when you close the tab. The address bar contains only settings such as mode, duration, target date and time zone so you can share them, never a running time.