Full Screen Clock

What can Full Screen Clock do?

Free online full screen clock tool. Switch between digital and analog clock modes, toggle 12/24 hour format, customize colors and sizes. Click the fullscreen button to enter browser fullscreen mode — perfect as a desktop clock, meeting room clock, or projection display. Pure frontend, no installation needed.

Why choose Full Screen Clock

• Dual Mode: Digital clock (large numbers) and analog clock (dial with hands), or both simultaneously
• 12/24 Hour Format: Freely switch between time formats, 12-hour shows AM/PM
• Fullscreen Display: One-click browser fullscreen mode for projection and desktop use
• Customizable Style: Adjust clock color, font size, show/hide seconds, date, and weekday
• Real-time Update: Auto-updates every second for precise time display

Full Screen Clock in 3 steps

1. Select clock mode (digital/analog/both) and time format (12/24 hour)

2. Customize clock color and font size

3. Toggle seconds, date, and weekday display

4. Click "Fullscreen" button to enter fullscreen mode

5. Press ESC to exit fullscreen

When to use Full Screen Clock

• Meeting Rooms: Project fullscreen clock for attendees to track time
• Classrooms: Exam timing, class time management
• Desktop Clock: Repurpose old monitors/tablets as desk clocks
• Live Streaming: Time reference overlay for broadcasts
• Kitchen Timer: Check time while cooking

Technical Background

The 24-hour format is the international standard (ISO 8601), avoiding AM/PM ambiguity. The 12-hour format is more common in English-speaking countries. Analog clock hands are calculated by angles: the hour hand rotates 30 degrees per hour (360/12), the minute hand 6 degrees per minute (360/60), and the second hand 6 degrees per second.

FAQ