30 Seconds Timer

Countdown — 30 Seconds

Set timer for 30 Seconds. Wake me up in 30 Seconds. Set the alarm for 30 Seconds from now. It is a free and easy-to-use countdown timer that runs entirely in your browser.

This page is pre-filled for a 30 Seconds countdown. Click Start when you are ready — the display shows remaining time in large digits, with optional fullscreen for visibility across the room.

Short second timers are perfect for quick tasks — steeping tea, rest between sets, or timing a brief step in a recipe. Use it for quick intervals where every second counts.

When the timer reaches zero, your chosen sound plays and an on-screen alert appears. Edit the timer to change duration, sound, title, or what happens at zero (stop, restart, or count up).

Frequently asked questions

How do I start a 30 Seconds timer?
The duration is already set to 30 Seconds. Click Start on this page. Use Pause and Reset anytime; press Space to start or pause when the timer is active.
Does the timer keep running in the background?
The timer runs in this browser tab. Keep the tab open and avoid putting your device to sleep for accurate countdown.
Can I share this timer with someone else?
Yes. Use the Share section at the bottom to copy a link with the duration encoded, or grab embed code for your website.
30 Seconds Timer — Free Online Countdown | onetimer