30 Second Timer
A free online 30 second timer that counts down 30 seconds and sounds an alarm when it's done. Press Start or hit the Space bar.
Keyboard: Space start/pause · R reset · F full screen
How to use the 30 second timer
- Press Start (or the Space bar). The ring shows how much time is left.
- Pick an alarm sound. Use Test sound to check your volume first.
- Pause, reset or add time whenever you need. Full screen makes the numbers easy to see from across a room.
- When the timer hits zero, the alarm rings for up to 30 seconds. Press Stop alarm to silence it.
Ways to use a 30 second timer
- Plank and wall-sit holds
- Stretching each side of the body
- Rest periods in circuit training
30 seconds in other units
- Seconds
- 30
- Minutes
- 0.5
- Hours
- 0.0083
- Clock format
- 00:30
Frequently asked questions
How do I set a timer for 30 seconds?
Press Start above. The 30 second timer is already set to 00:30, so it begins counting down right away, and an alarm sounds when it reaches zero.
Will the alarm ring if I switch tabs or lock my screen?
The alarm is scheduled with your browser’s audio engine the moment you press Start, so it rings on time even in a background tab. Keep the tab open and your volume up. Some phones pause web pages when the screen locks, so leave the screen on for short timers (the timer asks your phone to keep the screen awake while it runs).
How many seconds are in 30 seconds?
30 seconds is 30 seconds.
Can I pause or add more time?
Yes. Press Pause (or the Space bar) to pause, and use the +10 sec button to add time while the timer runs.
Is this timer free?
Yes. It runs in your browser with no app, account or sign-up, and works on phones, tablets and computers.