Online Clock for All Devices – No Sleep in Fullscreen

Yes, our online clock is completely free to use. You can access all features including the digital clock, timer, alarm, and stopwatch without any cost, registration, or hidden fees. We believe everyone should have access to reliable time management tools.

Our online clock is extremely accurate as it synchronizes with your device's system time, which is typically synced with internet time servers (NTP). The accuracy depends on your device's time synchronization, but is generally accurate to within milliseconds.

Yes, you can use our clock in fullscreen mode for a distraction-free experience. Simply click the fullscreen button to expand the clock to fill your entire screen. When in fullscreen mode, our clock automatically prevents your computer from going to sleep or activating the screensaver, ensuring the time display remains visible at all times. This is perfect for presentations, focus sessions, meditation timers, or when you need a large time display. The wake lock feature works on modern browsers that support the Screen Wake Lock API.

Yes, our online clock is fully responsive and works perfectly on mobile devices, tablets, and desktop computers. The interface adapts to your screen size for optimal usability. Touch controls are optimized for mobile use, and settings panels are designed for easy access on smaller screens.

Absolutely! You can customize various aspects including text colors, font sizes (1-12rem), font families, background colors and images, time format (12/24 hour), position on screen, and display options like showing seconds, date, weekday, and week numbers. All settings are automatically saved for your next visit.

No installation required! Our online clock runs directly in your web browser. Simply visit our website and start using the clock, timer, alarm, and stopwatch features immediately. This makes it perfect for use on shared computers, work environments, or any device with internet access.

You can set multiple alarms simultaneously. Each alarm can have a custom title, time, and sound. The system includes smart features like duplicate time prevention, snooze functionality, and a queue system for handling multiple alarms that ring at the same time.

Our timer includes quick preset options for 1 minute, 5 minutes, 10 minutes, 15 minutes, 30 minutes, and 1 hour. You can also set custom times by specifying exact hours, minutes, and seconds. All timers include visual countdown displays and audio alerts when complete.

Yes! Our stopwatch includes lap time recording with CSV export functionality. You can track multiple lap times, view them in a table format, and export the data for analysis in spreadsheet applications. There's also a clear data function to reset all recorded times.

Once loaded, the basic clock functionality works offline since it uses your device's system time. However, you'll need an internet connection to initially load the page and access advanced features. Your settings are saved locally and will persist between sessions.

Our online clock works on all modern web browsers including Chrome, Firefox, Safari, Edge, and Opera. It's built with standard web technologies and is compatible with both desktop and mobile browsers. For the best experience, we recommend using an up-to-date browser version.