CleanorTools
Time

Online Clock

Details

How to use Online Clock

What the tool does, how to run it, and what to expect from the result.

How to use the online clock

The clock reads your device's system time once a second and draws it two ways: as an SVG analog face with hour, minute, and second hands, and as a large digital readout with the full date underneath.

The two controls change how it reads, not what it reads. The time zone is your own, detected from your browser.

  • Open the page; the clock starts immediately using your device's local time zone.
  • Choose 24-hour or 12-hour format from the hour format selector.
  • Turn seconds off if you want a calmer face without the red second hand.
  • Put your browser in fullscreen (F11, or Control-Command-F on macOS) to use it as a desk clock.
  • Keep the tab in the foreground so the browser does not throttle the one-second tick.
Tips

Getting a better result out of Online Clock

Specific settings and thresholds, not general advice.

  • The clock ticks on a one-second interval, which means the second hand can visibly stutter or skip if the tab is throttled. Browsers slow timers in background tabs, so leave the clock in the foreground if you are using it as a desk clock.
  • The face is drawn as an SVG with the hour hand at 30 degrees per hour plus 0.5 degrees per minute, so it creeps between the hour marks the way a real analog clock does rather than jumping.
  • Hiding seconds removes both the red second hand and the digital seconds, which makes the display noticeably calmer on a second monitor and stops the tick from pulling your eye every second.
  • The zone is your device's own, detected via Intl and not selectable. For any other city you want the world clock instead; this one is deliberately a single-face desk clock.
  • There is no alarm, no stopwatch, and no timer here. If a tab needs to fire at a specific moment, do not rely on a browser tab that may be throttled or asleep; use your operating system's timer.
Limits

What Online Clock does not do

The honest boundary, so you do not lose time finding it yourself.

  • Your local zone only; no city or time-zone selector.
  • No alarm, timer, stopwatch, or countdown.
  • No fullscreen button of its own (use the browser's fullscreen mode).
  • No date format, font, or theme options.
At a glance

Who Online Clock is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Anyone needing a live on-screen clock.

Ideal for

Using the online clock without installing anything or signing up.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Where does the time come from?

From your device's system clock, read once a second and formatted with your browser's own locale and time-zone data. There is no network time server behind it, so if your machine's clock has drifted, this clock has drifted by exactly the same amount.

Can I use it as a full-screen desk clock?

Yes. Put the browser into fullscreen with F11 on Windows and Linux, or Control-Command-F on macOS, and the analog face and the large digital readout fill the screen. Keep it as the foreground tab, because background tabs get their timers throttled and the clock will visibly stutter.

Why does the second hand sometimes jump two seconds?

The tick is a one-second interval, and browsers deliberately deprioritise timers in tabs that are not visible, or when the machine is under load. When the tab regains focus the clock immediately resyncs to the real system time, so it self-corrects rather than drifting.

Can I show a different city's time?

No. This clock shows your own detected time zone and has no zone selector. For other cities, use the world clock, which shows several zones at once with their live UTC offsets.

Does it work offline?

Yes, once the page has loaded. Nothing is fetched to render the clock, the time comes from your own device, and the formatting comes from the Intl APIs built into your browser.

Recommendations

You Might Also Like

Nearby tools from the catalog that fit the same job or workflow.

CD
UtilityTime

Countdown Timer

Online countdown timer

Set a number of minutes and count down to zero. Free, in your browser, no sign-up.

24h
UtilityTime

Military Time Converter

24-hour clock, both directions

Convert 24-hour military time to the 12-hour clock and back, both live.

WC
UtilityTime

World Clock

Time

See the current time in cities and time zones worldwide at a glance. Free, in your browser, nothing is uploaded.

SW
UtilityTime

Online Stopwatch

Online stopwatch

Start, pause, and reset a stopwatch that counts up. Free, in your browser, no sign-up.

POM
UtilityTime

Pomodoro Timer

Pomodoro timer

Run a 25-minute focus and 5-minute break cycle to stay productive. Free, in your browser, no sign-up.

READ
UtilityTime

Reading Time Calculator

Estimate reading time

Estimate how long text takes to read and to read aloud based on word count. Free, in your browser, no upload.

Cleanor app

Do it all on your device

Cleanor puts these tools in one app: compress and convert images, video, and audio, work with PDFs, and scan text right on your device. Plus free up storage and clear inbox clutter with Email Cleaner. Start with a free trial.

  • iPhone
  • Android
  • Macsoon
  • Windowssoon
Get it on the App StoreGet it on Google PlayAll platforms & pricing