This countdown timer counts down from any duration up to 23:59:59 and alerts you at zero with a spoken "Time is up!" plus, if you've allowed it, a browser notification. Everything runs locally in your browser — no account, no app, and nothing about your timers is sent to a server.
Type hours, minutes, and seconds, or tap a preset from 1 minute to 1 hour. Press Start and a progress bar drains as time passes; the remaining time also shows in the tab title, and in the final 10 seconds the display turns red and pulses. Pause and Resume keep your place; Reset reloads the duration in the input fields.
Two alerts fire at zero: a voice announcement through your browser's speech synthesis, and a desktop notification if you clicked Allow when the page asked. The notification is what reaches you in another app, so it's worth granting. Browsers slow timers in hidden tabs, so for long countdowns keep the tab visible or in its own small window — the tab-title countdown makes it easy to check.
23 hours, 59 minutes, and 59 seconds — one second short of a full day. At an hour or more the display shows hours too; under an hour, just minutes and seconds.
The spoken alert plays through the page, and if you granted permission you'll also get a desktop notification even while the tab is hidden. Since browsers throttle hidden tabs, keeping the tab visible is the most dependable setup.
Not mid-run — the inputs dim while counting down. Press Reset first, which stops the timer and loads whatever duration is in the hours, minutes, and seconds fields, then Start again.
That's the built-in warning for the last 10 seconds. It's purely visual — nothing sounds until zero — but it gives you a chance to wrap up before the alert fires.