Online Countdown Timer with Alarm
Set a countdown in hours, minutes and seconds with an alarm sound. Works in the background and full screen.
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Comment utiliser Countdown Timer
- 1
Ouvrez Countdown Timer sur cette page. Il se charge directement dans votre navigateur.
- 2
Ajoutez votre fichier, texte ou valeurs et ajustez les réglages.
- 3
Copiez ou téléchargez le résultat. Rien n'est envoyé ni stocké.
À propos de cet outil
Pick a preset (1, 5, 10, 30 minutes…) or type any hours, minutes and seconds, then press Start (or the space bar). An alarm plays when time is up, even if the tab is in the background.
Use full screen for classrooms, presentations and workouts. Need to count up instead? Switch to the stopwatch; for focused work sessions try the Pomodoro timer.
Fonctionnalités
- Any time up to 99 hours, or one-tap presets
- Alarm sound and optional notification
- Accurate in background tabs
- Full-screen mode for classrooms
- Time shown in the browser tab
Questions fréquentes
Does the timer keep running if I switch tabs?
Yes. Time is calculated from the clock, so it stays accurate, and the alarm still plays.
Can I get a notification?
Allow notifications when you start the timer and you'll get one when time is up.
Can I use it full screen?
Yes, click the full-screen icon at the top of the timer.