20 Minute Online Timer & Countdown

Set a free 20 minute online timer with a loud alarm sound. Precise countdown that works offline and prevents your screen from sleeping while running.

20:00

MinsSecs

Alarm: classic

Space Play/PauseR ResetF Fullscreen Works Offline

Choose another duration:

1 Minute Timer 2 Minute Timer 3 Minute Timer 5 Minute Timer 10 Minute Timer 15 Minute Timer 25 Minute Timer 30 Minute Timer 45 Minute Timer 1 Hour Timer 2 Hour Timer 5 Hour Timer

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About the 20 Minute Timer

The 20 Minute Timer is a dedicated web countdown utility pre-configured to run a precise 1200-second timer immediately upon page load. Designed with performance and usability in mind, this landing page is lightweight, optimized for SEO rankings, and fully responsive across all device sizes.

Perfect for: power naps, presentation drafts, yoga flows, baking small pastries, and focused reading.

Why Use This Pre-configured Page?

Instead of configuring hours, minutes, and seconds manually, this dedicated route allows you to start timing with a single click. It serves as a great bookmark link for standard repeating routines, such as tea steeping, focus periods, or exercise sprints.

Frequently Asked Questions (FAQ)

Simply load this page, choose your desired alert tone, and press the Start button. The timer will count down from exactly 20 minutes and ring when completed.

Yes! The dynamic synthesized alarm is built on HTML5 Web Audio, running entirely on your client machine with no external download dependencies. It remains 100% offline-functional.

No. Our system triggers a wake lock session while the timer is running. Your screen will remain fully awake so you can easily view progress.