Stopwatch
⚙️ Settings
What Can the Online Digital Clock Do?
The Online Digital Clock is a free fullscreen digital clock tool that displays the current time in real-time. Supports 12/24 hour format switching, date display, stopwatch timing, and fullscreen mode. Perfect as a desktop clock, presentation clock, or teaching timer. Pure frontend implementation — no installation needed, just open and use.
Key Features
- Real-time Clock: Large digit display with automatic per-second updates
- 12/24 Hour Format: One-click toggle between time formats
- Date Display: Shows year, month, day, and day of week
- Stopwatch Mode: Precise timing down to milliseconds
- Fullscreen Mode: Clock fills the entire screen for presentations
How to Use
- Open the page to see the current time in large digits
- Toggle 12/24 hour format, enable/disable date and seconds in settings
- Click fullscreen for immersive display
- Switch to stopwatch mode for precise timing
Use Cases
Presentations & Meetings
Display the clock fullscreen on a projector so attendees can track time and manage meeting pace.
Teaching & Exams
Use the stopwatch for timed exams or activities. Large display is easy for students to see.
Desktop Clock
Use fullscreen mode as a modern desktop clock replacement — clean and beautiful.
Technical Notes
Digital clocks first appeared in the early 20th century and became widespread with LED and LCD technology. This online clock uses the browser's Date API for high-precision time display. Fullscreen mode uses the Fullscreen API, compatible with all modern browsers.
Does it support fullscreen?
Yes, click the fullscreen button to enter fullscreen mode.
Can I switch 12/24 hour format?
Yes, toggle in settings with one click.
Does it need internet?
No, uses device local time. Works offline after loading.
Is there a stopwatch?
Yes, switch to stopwatch mode for millisecond-precise timing.
Is the time accurate?
Time comes from your device's system clock.