Online Digital Clock
Free fullscreen digital clock with timezone dashboards, OBS embeds, no ads, no tracking, and offline PWA support.
Made by Timo Heimonen · timo.heimonen@proton.me
Free fullscreen digital clock with timezone dashboards, OBS embeds, no ads, no tracking, and offline PWA support.
A+ carbon rating. Report.
| Control | Description |
|---|---|
| Theme (moon/sun icon) | Switch between dark and light mode |
| Keep screen on (monitor icon) | Prevent the display from sleeping |
| Show seconds (stopwatch icon) | Show or hide seconds in the digital time |
| Menu (MENU button) | Open clock tools, settings, help, and site links |
Add ?tz= to the URL with any IANA
timezone:
clocksimulator.com/digital/?tz=America/New_York clocksimulator.com/digital/?tz=Europe/London clocksimulator.com/digital/?tz=Asia/Tokyo
Show multiple digital clocks at once by separating timezones with commas. Use &rows= to
control the grid layout:
clocksimulator.com/digital/?tz=UTC,Europe/Helsinki,America/New_York clocksimulator.com/digital/?tz=UTC,Europe/Helsinki,America/New_York,Asia/Tokyo&rows=2
You can also use the dashboard builder (MENU → Build dashboard) to visually add timezones and configure the grid.
Embed the digital clock on any website via an <iframe>. Use the built-in embed builder (MENU → Embed) to
configure, preview and copy the code.
| Parameter | Values | Default |
|---|---|---|
embed |
true |
— |
tz |
IANA timezone(s), comma-separated | Local time |
rows |
Number (e.g. 2, 3) |
Auto |
theme |
dark, light, transparent |
System preference |
color |
dark, light, or 3/6-digit hex without # (e.g. 0af, FF8800; clock color with theme=transparent). Invalid or missing values use the default. |
light |
seconds |
show, hide |
show |
format |
24, 12 |
24 |
border |
show, hide |
hide |
daynight |
show, hide |
hide |
burnin |
true, false |
true |
To protect OLED and AMOLED displays, the clock subtly shifts its position every 10 minutes in a slow
circular pattern. Dark Mode further reduces the risk of burn-in. Protection does not apply in embedded
mode or when your device prefers reduced motion. Use ?burnin=false to disable.
This site works as a Progressive Web App. You can install it on your phone or computer for a full-screen clock and offline use. Use your browser’s menu to install.
No ads and no tracking. Read the privacy policy at /privacy and the terms of service at /TOS.
This web app runs on sustainable energy and achieves an A+ carbon rating. View the carbon report.