Online Clock
Clean, large-digit digital clock showing current local time with seconds, date display, 12/24-hour switching, and fullscreen mode.
Thursday, September 24, 2026
03:44:58
Today Progress16%
Free Online Digital Clock with Fullscreen Display
AlarmOnline.net provides a free online digital clock showing the current local time directly in your browser. Whether you need a large desk clock, a full-screen display for meetings, or an ambient bedside clock, you can toggle between 12-hour and 24-hour modes, show or hide seconds, display the full calendar date, and expand to full screen with a single click.
How to Use This Tool
- 1View current local time — The clock automatically loads and displays the current local time from your device system clock.
- 2Toggle 12-hour or 24-hour format — Click the format toggle button to switch between 12-hour AM/PM and 24-hour military time display.
- 3Show or hide seconds — Click "Show Seconds" to toggle the live seconds ticker on or off based on your preference.
- 4Show or hide date and day — Click "Show Date & Day" to display or conceal the weekday, month, day, and year.
- 5Expand to fullscreen — Click "Fullscreen" to fill your entire screen on desktop monitors, laptops, or tablets for a distraction-free digital desk clock.
- 6Track daily progress — Monitor the day progress indicator to see the percentage of the current 24-hour day elapsed in real time.
Key Features & Capabilities
High-Visibility Digital Readout
Clean, large digits designed for easy legibility from across a room, classroom, studio, or office.
12-Hour & 24-Hour Modes
Easily switch between standard 12-hour format with AM/PM indicators and 24-hour military time.
Customizable Seconds & Date Display
Toggle the seconds counter and calendar date banner to suit minimalist or detailed timekeeping needs.
Fullscreen Theater Mode
One-click full-screen display mode turns any laptop, tablet, or secondary monitor into a dedicated digital clock.
Screen Wake Lock Support
Requests the browser Screen Wake Lock API to help keep your screen awake while the clock is active and visible on supported devices.
Integrated Time Tools
Looking for alarms or countdowns? Set scheduled reminders with our Online Alarm Clock, time activities with the Online Timer, measure split laps with the Online Stopwatch, check international cities with the World Clock, or calculate time differences with the Time Zone Converter.
Popular Use Cases
Desk Clock & Second Monitor
Display a clean, distraction-free clock on a secondary monitor or tablet while working.
Classrooms & Keynotes
Project the current time in classrooms, conference rooms, and lecture halls to keep schedules on track.
Meetings & Presentations
Keep presenters and attendees aware of local time pacing during team meetings and webinars.
Bedside & Nightstand Display
Use a tablet or smartphone in fullscreen for low-light bedside timekeeping.
Workstations & Kitchens
Check current time at a glance from across the room while cooking, crafting, or exercising.
Study & Productivity Focus
Keep track of real-world time during study blocks, exams, and Pomodoro focus intervals.
Frequently Asked Questions (FAQ)
What time does the online clock show?
The online clock displays the current local time provided by your device or operating system clock.
Is this online clock free?
Yes. The digital clock on AlarmOnline.net is 100% free with no account registration, subscriptions, or downloads required.
Do I need to install anything?
No installation or browser extensions are needed. The clock runs directly inside standard web browsers on desktop computers, laptops, tablets, and smartphones.
Can I use the clock in fullscreen?
Yes. Click the "Fullscreen" button to expand the digital clock across your entire screen. Press the button again or press the Escape key to exit fullscreen mode.
Can I switch between 12-hour and 24-hour time?
Yes. Click the 12-Hour/24-Hour toggle button to switch instantly between standard 12-hour format with AM/PM indicators and 24-hour format.
Can I display or hide seconds?
Yes. Click the "Show Seconds" button to toggle the live seconds ticker on or off based on your viewing preference.
Can I show the current date?
Yes. Click the "Show Date & Day" button to display the weekday, month, day, and year above the digital time readout.
Will my screen stay awake while the clock is open?
The clock automatically requests the browser Screen Wake Lock API to help prevent your display from dimming or sleeping while the tab remains active and visible. This feature depends on your browser supporting the Wake Lock API and your operating system power settings.
Is the clock synchronized with atomic time?
The clock reads time directly from your device local system clock. It does not query an external atomic clock server directly. However, most modern operating systems automatically synchronize their internal system clock with Network Time Protocol (NTP) time servers.
Does the clock use my device local time?
Yes. The clock automatically retrieves your local time and timezone from your browser without requiring manual timezone configuration.
Does the clock work offline?
Yes. Once the webpage has loaded, the digital clock operates entirely client-side using your device internal clock even if your internet connection disconnects.