Timer / Timer Durations
Shared Timer — Pick A Duration, Share The Link
Every duration below runs the same board you see here, and every one of them is shareable: set the length, copy the link, and anyone who opens it counts down to the identical second. Pick a quick timer in the panel below, or type any custom length.
Change the countdown
Common durations, and what people use them for
All of these are the same shared board at a different length — the quick buttons below set them in one click.
- 1–5 minutes — a quick break, a lightning talk, a board-game turn, or the last leg of someone's turn. Short enough that everyone actually watches it end.
- 10 minutes — a coffee break, a daily standup, or a timed writing sprint. Drop the link in your team chat and nobody installs anything.
- 15 minutes — a classic break length, and a common quiz-round or lightning-talk limit. Share it once and every team's device shows the identical time remaining, so nobody can dispute the cutoff.
- 20–30 minutes — a workshop segment, a timed exercise, a half-length meeting, or a timed test section.
- 25 minutes — the classic Pomodoro focus block. There's a dedicated Pomodoro page if you want the full work/break rhythm written out.
- 45 minutes — one of the most common school class-period lengths, and a typical workshop session. Put it on the projector; every phone in the room can pull up the same link.
- 1 hour — a full class, a standard exam block, or a meeting you'd like to actually end on time. Once a countdown includes hours the board switches to HH:MM:SS, and that format stays fixed for the whole hour so the display never jumps partway through.
Counting up instead: the shared stopwatch
Most online stopwatches live and die on one screen. Switch Direction to “Count up” below and this one becomes shareable: press start, send the link, and everyone who opens it sees the same elapsed time ticking up, because the start instant travels inside the link itself.
Nothing is actually “running” anywhere, which is why closing the tab doesn't lose it — the link records when the stopwatch started, so reopening it later shows the correct elapsed time as if it had been running the whole while. There's deliberately no lap or split function; for lap timing you want a single-device sports stopwatch. This tool's job is showing one agreed elapsed time on many screens.
Common questions
- Accurate to about a second. Each device counts down independently against the same shared deadline using its own clock, so there's no server lag to introduce drift between screens.
- No limit. Since there's no server tracking viewers, showing the countdown to one person or a thousand costs exactly the same — nothing. Each device just does its own math against the timestamp in the URL.
- Yes. Reopening the link re-reads the same deadline from the URL and picks up exactly where the countdown should be — nothing resets.
- Yes, on any device that already has the page open. The countdown is calculated locally against a timestamp in the URL, so it doesn't need an ongoing connection to keep counting.
- Yes. Set it on the board itself: click a pair of digits and roll them with the up and down arrows, or just type the time in — typing 7 0 0 gives you 7:00, the same way a microwave works. Rolling the minutes past 59 adds an hours pair automatically, and you can add or remove hours with the small +hr control to the left of the digits. The custom-minutes field and the date & time field below the board still work the same way.
- The board is the control. Hover or tap a pair of digits and small up and down arrows appear over them; click those, use the arrow keys, scroll over the digits, or drag them up and down on a touchscreen. You can also paste a duration like 1:30:00 or 90m straight onto the board. Once a countdown is running the board locks, so nobody watching your shared link can change what the room sees.
- Every open screen hits zero at the same instant and plays a short chime if sound is on. Nothing else happens automatically, so it's safe to leave running in the background.