GlassClock

Three tools live under one roof here, switched with the tabs above the clock face.

Clock

Shows your local time front and center, with a scrollable list of world clocks below it — search for any of 250+ cities and add it with one tap. Toggle between 12-hour and 24-hour format anytime.

Timer

Set hours, minutes, and seconds, then start the countdown ring. Turn on the alarm toggle beforehand if you want a sound (and a full-screen alert) when it hits zero.

Stopwatch

Start, lap, and reset — every lap is logged below with its split time from the previous one.

The fullscreen button (top right) strips away everything but the active tab's own display, for a clean desk clock or presentation view.

GlassClock is a free, instant-use web clock with world time zones, a countdown timer with alarm, and a stopwatch. No installs or accounts needed — open your browser and start using it immediately.

Features

• Live digital clock with 12-hour and 24-hour format toggle
• World clocks for 250+ cities and countries including Kingston, Jamaica
• Add or remove any city with one click — saved to your browser
• Countdown timer with customizable alarm sound
• Stopwatch with unlimited lap tracking
• Fullscreen clock mode for desk display or presentations
• Dark mode and light mode with smooth 800ms transitions
• Zero external dependencies — works offline after first load

Who Is It For?

Remote workers tracking multiple time zones, developers running timed sprints, students timing study sessions, teachers running classroom activities, or anyone who wants a beautiful, distraction-free clock in their browser tab.