A big, clean clock for any screen
Open it on a projector, a second monitor or a classroom TV. Press F for fullscreen and the screen stays awake. Want it on every new tab? Add the free extension.
Add to Chrome, it's free Also works in Edge, Brave and Opera. No sign-up.
What you get
Fullscreen in one click
Press F or the expand button. While the clock is fullscreen, your screen will not go to sleep.
Timer and stopwatch
A countdown with a progress bar and a soft chime, and a stopwatch with laps. Handy for talks, exams and workouts.
Your new tab, upgraded
With Clock Tab installed, the same clock opens on every new tab, with styles, backgrounds and world clocks.
Private and offline
No account, no ads, no tracking inside the extension. It keeps working without internet.
Popular uses
Questions
How do I make the clock fullscreen?
Click the expand icon in the top right corner or press F. Press Esc to exit.
Does it show my local time?
Yes. The clock uses your device's time and time zone and picks a 12 or 24 hour format from your language.
Is Clock Tab free?
Yes. The extension is free, with no ads and no subscription.
Which browsers does the extension support?
Chrome, Edge, Brave, Opera and other Chromium browsers through the Chrome Web Store. This page works in any browser.