Alarm options
Space start / pause · R reset · F fullscreen
A 30 second timer, ready to start
This timer is already set to 30 seconds. Press Start — or the Space bar — and it counts down half a minute with big digits and a progress bar. At zero an alarm rings and "Time's up!" shows on the screen. Restart runs it again with one tap.
Leave it in a tab while you do something else: the time left shows in the browser tab title, and a notification can pop up at the end. Or press Fullscreen to fill the screen.
Features
- Ready at 30 seconds — press Start or Space, nothing to set
- Big digits, progress bar, Fullscreen — easy to read from across a room
- Restart — the same 30 seconds again, for sets and rounds
- +10 sec — a little more time while it runs
- Presets in seconds — 10, 15, 20, 30, 45 seconds, 1 minute and 90 seconds
- Four alarm sounds that can ring until you press Stop
- Time left in the tab title, plus an optional notification
- Keeps the screen on while it runs
What people use a 30 second timer for
- Holds and stretches — a 30-second plank, wall sit or stretch; Restart for the next one
- Short intervals — 30 seconds of jump rope or high knees, then rest
- Classroom — 30 seconds to think before you answer, or to tidy up a desk
- Speaking — a 30-second introduction or sales pitch; most people say 60 to 80 words in that time
- Games — a 30-second round to guess, draw or name as many things as you can
- Kitchen — let a pan heat up, or stir something for half a minute
30 seconds in rounds
Many workouts and games use several 30-second rounds. Press Restart at each "Time's up!":
| Rounds of 30 s | Total time |
|---|---|
| 2 | 1 minute |
| 4 | 2 minutes |
| 6 | 3 minutes |
| 10 | 5 minutes |
| 20 | 10 minutes |
To run rounds with rest in between by themselves, use the Interval Timer — for example 30 seconds of work and 30 seconds of rest.
Frequently asked questions
Does it keep running in another tab?
Yes. The timer reads the clock, so the alarm rings on time even when the tab is in the background. Do not close the tab.
Can I add time?
Yes. Press +10 sec while it runs or while it is paused, as often as you need.
Can I make it 45 seconds or 1 minute?
Tap the 45 sec or 1 min preset, or type minutes and seconds in the boxes above the timer.
Can I change the alarm sound?
Yes. Open Alarm options and pick a beep, a bell, a digital watch or a gentle chime. You can also let it ring just once.
Is it free?
Yes. No sign-up and nothing to install. It works offline once the page is open.
Related tools
- 10 Second Timer — ten quick seconds with an alarm
- 1 Minute Timer — one minute with an alarm
- 2 Minute Timer — two minutes with an alarm
- Interval Timer — work and rest rounds that repeat
- Timer & Stopwatch — set any time
How to use it
- Press Start (or the Space bar) — the 30 second countdown begins
- Press Pause to stop for a moment and Resume to go on
- When the alarm rings, press Stop, or Restart for another 30 seconds
- Press +10 sec to add time, or tap another preset to change the time
- Press Fullscreen to show the timer big on your screen
