Digital Clock Online — Full Screen, Free
Free online digital clock with 12/24 hour, seconds, fullscreen, multiple timezones. Browser-only.
About Draw Digital Clock
A digital clock displays the current time in numeric form (HH:MM:SS) — useful as a fullscreen kitchen / studio / classroom clock, on a second monitor for time-zone awareness, or as a timer reference. The ZTools Digital Clock runs in any modern browser, supports 12-hour / 24-hour formats, optional seconds + date display, multiple time-zone clocks side by side, and a fullscreen mode for projector / monitor use. No ads, no upload, no signup — refreshes every second using performance.now() for drift-free accuracy.
Use cases
- Studio / classroom wall clock. Project to a screen at the back of the room — every speaker can see the time.
- Multi-timezone team awareness. A remote team across NYC / London / Singapore — three clocks side by side gives instant coordination context.
- Fullscreen kitchen timer reference. Tablet on the kitchen counter; fullscreen clock with seconds for cooking timing.
- Streaming / video on-screen clock. For "this happened at" reference in long-form videos. Browser source in OBS / Streamlabs.
How it works
- Pick format. 12-hour (with AM/PM) or 24-hour (military / international).
- Configure display. Show / hide seconds, date, day name. Pick font (sans / mono / segment-display).
- Add timezones. Up to 4 clocks side by side. Pick from any IANA timezone (America/New_York, Europe/London, Asia/Tokyo).
- Fullscreen. Toggle fullscreen for projector / monitor use. Browser handles the rest.
Examples
Input: Default (24-hour, seconds, current TZ)
Output: 14:32:07 (refreshing every second).
Input: 12-hour with date
Output: 2:32:07 PM\nWednesday, May 6 2026.
Input: Multi-TZ: NYC, London, Tokyo
Output: Three columns. Different times. Useful at a glance for a global team.
Frequently asked questions
How accurate is the time?
Refreshes every 1 second using performance.now() ticks. Browser tab clocks rely on the OS clock, which is sync'd via NTP. Accuracy: ±1 second from atomic time on a normal Internet connection.
Does it work offline?
Yes — once loaded. No server pings. Time comes from the OS clock.
Time zone abbreviations?
Displayed (e.g. EST, GMT, JST) — but DST handling varies. IANA timezone strings (America/New_York) are unambiguous.
Privacy?
No tracking, no analytics. Browser-only.
Pro tips
- Use 24-hour for international / engineering contexts; 12-hour for casual / US use.
- For multi-timezone teams, label clocks with city / member name so each is unambiguous.
- For studio use, dim the clock's background to dark to avoid screen glare.
- For OBS browser sources, set the page CSS background to transparent and overlay the clock on your scene.
Reviewed by Ahsan Mahmood · Last updated 2026-05-06 · Part of ZTools.
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