Countdown timer
Custom countdown timer with optional sound alert.
The alert sound is generated by the browser Web Audio API — no audio file is loaded. Keep the tab in the foreground for best accuracy.
Features
- Set hours, minutes, and seconds freely
- Optional sound alert with continuous beep on completion
- Start, pause, resume, and reset controls
- Quick presets for 1, 5, 10, 25 minutes and 1 hour
FAQ
How is the sound generated?
The alert uses the browser Web Audio API to generate a beep — no audio files needed, no network required.
Does it run in the background?
Timer accuracy may be affected when the tab is in the background. Keep the tab in the foreground for best results.
About Countdown timer
Online countdown timer with optional sound alert. Set hours, minutes, and seconds. Perfect for pomodoro, exams, and competitions. This tool runs entirely in your browser. No data is uploaded to the server, helping protect your privacy. Everything works instantly with no software or plugin required.
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