05:00
Work
Rest
Rounds
Date
Time
Time is up
Turning this on asks your browser for permission once.
Paste that anywhere HTML is allowed. Free to use, no attribution required.
The countdown is anchored to a finish time, so it stays exact even if the tab is in the background. Press Test sound once so the browser lets audio play. Space starts and pauses, L takes a lap, R resets.
High intensity interval training alternates hard efforts with short recoveries. This page opens at forty five seconds of work and fifteen of rest, over ten rounds, which suits most circuit sessions.
Change any of the three boxes and press Start. Nothing is saved to a server, and the numbers you used last are remembered on your own device for next time.
A free online timer, stopwatch and countdown clock that runs entirely in your browser. No account, nothing to install.
It keeps working offline once loaded, and you can add it to your home screen like an app. Your settings stay in your own browser.
Press Voice control and allow microphone access, then speak normally. Your speech is handled by your browser's own speech service, and nothing is stored by this page. Allow the microphone once and switch this on once, and it stays on as you move around the whole site, in this tab or a new one. It switches itself off after an hour of not being used. The button always shows whether it is listening, and tapping it stops it for good.
Beginners usually do better with equal work and rest, such as 30/30. Trained athletes often work at 2:1 or 3:1. All of those are two edits away on this page.
Yes. Press Voice control and say "pause" or "reset" without touching the screen.