100% Free • Zero Server Uploads • Private
Countdown Timer
Set customizable countdown timers for productivity, workouts, cooking, or study with quick presets and an audio alarm.
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100% Client-Side Privacy
All computation happens right in your browser's JavaScript engine. No data is ever sent to any remote server.
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Instant Results
Zero network latency. Calculations and formatting are executed instantly with high cryptographic and mathematical precision.
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Works Offline
Once loaded, this tool can function completely offline with no active internet connection required.
Frequently Asked Questions
Does the audio alert work offline?
Yes, the audio tone is generated locally via Web Audio API without downloading external audio files.
Can I set timers longer than 60 minutes?
Yes, you can configure hours, minutes, and seconds up to 99 hours.