Online Clock
Live current time right now with seconds, date, timezone, 12/24-hour toggle, and fullscreen mode
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Understanding UTC offsets
Every timezone is defined as an offset from Coordinated Universal Time (UTC) — the global reference clock at 0° longitude. UTC+0 (e.g. London in winter, Reykjavik) is the baseline; UTC+5:30 (India) is 5 hours 30 minutes ahead; UTC−8 (US West Coast) is 8 hours behind. Most offsets are whole hours, but some (India, Nepal's UTC+5:45, parts of Australia) include extra minutes. Daylight saving time shifts a zone's offset seasonally — New York moves from UTC−5 (EST) to UTC−4 (EDT) in summer — which is why your clock here always shows your zone's current offset, read straight from your device.
Related time tools
- Time Zone Converter — convert this time to any other zone
- Countdown Timer — count down to a date or duration
- Stopwatch — measure elapsed time with laps
Quick Answer
The current time is shown live below, updating every second straight from your device clock — no reload needed. You get large easy-to-read digits, the full date with weekday, your detected timezone, a 12/24-hour toggle, optional milliseconds, and a fullscreen mode. Everything runs locally in your browser; nothing is uploaded and no sign-up is required.
How It Works
Open the page — the current time appears immediately, ticking every second
Switch between 12-hour and 24-hour display; your choice is remembered
Enable milliseconds if you need sub-second precision
Click fullscreen to use the clock as a large wall clock; press Esc to exit
Key Facts
- Shows the current time right now, live-updating every second
- Large digits designed to be readable across the room
- Full current date with weekday and your detected timezone label
- 12/24-hour toggle and milliseconds display — both remembered between visits
- Fullscreen mode for using it as a desk or wall clock on any screen
- Time is timestamp-based, so background-tab throttling never skews it
- 100% client-side: no network calls, no uploads, no sign-up
- Free to use with no limits
Frequently Asked Questions
Does this clock use my device time?
Yes. The clock reads your device's system clock directly through the browser — it never fetches time from a server. If your device clock is accurate, this clock is accurate. If it looks wrong, fix the time or timezone settings on your device and the clock will follow immediately.
How accurate is an online clock?
It is exactly as accurate as your device's clock, typically within a second of true time if your device syncs via NTP (which phones and computers do automatically). Display updates are timestamp-based and re-synced against the system clock, so tab throttling or brief freezes never make the displayed time drift.
Can I use it as a fullscreen wall clock?
Yes. Click the fullscreen button and the clock fills your entire screen with large digits — ideal for a spare monitor, tablet, or TV. Press Esc or tap the button again to exit.
Does the clock keep ticking in a background tab?
Browsers throttle background tabs, but the displayed time never drifts because every update is computed fresh from the current system timestamp rather than counted intervals. When you return to the tab, the time shown is already correct.