What is a lesson timer?

A lesson timer helps you time study, exams, practice sessions, and focused work in your browser.

Does it play a sound?

Yes. The timer uses the NotVclock alarm system when the countdown finishes.

Yes. It works on mobile, tablet, and desktop browsers.

Preset countdown

No. It runs directly in your browser.

Use this lesson timer for teaching, activities, and learning blocks.

Preset online countdown with pause, reset, and quick restart.

Ready to run

00:00:00

Ready to start.

Timer sound

Hours

Minutes

Seconds

Related timer pages

This page loads the timer with 0 hours, 25 minutes, and 0 seconds pre-filled so you can start it immediately.

Yes. The fields stay editable after the page loads.

Timer FAQ

Does this timer work in background tabs?

Yes. The timer keeps counting in your browser and will trigger its alarm when it ends.

Does the timer play sound when finished?

Yes. The timer plays an alarm sound when the countdown reaches zero.

Can I use this timer on mobile?

Yes. This online timer works on mobile phones, tablets, and desktop browsers.

Do I need to download anything?

No. It runs directly in your browser with no download required.