livetime.now — Live Time Now, Fullscreen Clock & Timers

More on livetime.now

Seconds Counter Seconds A precision readout for when the seconds are the point. Fullscreen Clock Fullscreen A big clock for a second monitor, a lobby screen or a stream — with a wake lock so it stays on. Countdown Timer Timer Set minutes, start, and get a clear countdown with an alert at zero. Stopwatch Stopwatch Start, stop, lap — elapsed time measured properly.

livetime.now shows live time on any screen. The live clock ticks with real milliseconds, the fullscreen display is sized for a second monitor, a lobby or a stream and keeps the screen awake, and there is a countdown timer and stopwatch for measuring rather than reading time. Nothing to install.

Honest about accuracy

A browser clock reads your device's clock, and your device's clock is kept honest by NTP. That chain is usually good to a few tens of milliseconds, which is plenty for a display and not enough for laboratory work. Our guides explain the difference between wall-clock time and monotonic elapsed time, why background tabs throttle timers, and how to set up a display that runs unattended for weeks.

From our guides

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Setup tips Second Monitor Clock: A Full-Screen Time Display On Your Spare Screen Turn a spare display into a clock that reads at a glance: getting the window onto the right screen, going fullscreen, keeping it visible, and dimming it sensibly. 5 min read Setup tips How To Get A Fullscreen Clock In Every Browser Shortcuts, menus and mobile workarounds for filling any screen with a clock, plus the Fullscreen API behind them and the snags that catch people out. 5 min read How it works How Accurate Is A Browser Clock? Browser Clock Accuracy Explained A browser clock is exactly as accurate as the device it runs on. Here is what it inherits from the system clock, how far hardware drifts without NTP, and how to check your own. 6 min read Setup tips How To Add A Live Clock For Streaming Overlays A clock overlay answers the question chat keeps asking. Here is how to add one as an OBS Studio browser source and keep it readable over moving video at real bitrates. 6 min read Setup tips Kiosk Clock Display: Running A Clock On Lobby And Signage Screens One screen, one page, no controls. How to run a clock in browser kiosk mode on lobby and signage displays so it stays awake, stays legible and stays correct for months. 5 min read How it works Millisecond Precision In The Browser: Date.now() vs performance.now() Browsers expose two clocks with different guarantees. Here is how Date.now() and performance.now() differ, why background tabs throttle timers, and why animation frames beat intervals. 6 min read How it works NTP vs Browser Time: Where Your Clock Really Gets The Time Time reaches your screen through a hierarchy: atomic clocks, NTP servers, your operating system, then the browser. Here is what each layer does and where accuracy is won or lost. 6 min read Setup tips Screen Wake Lock And Battery: Keeping A Clock Awake Without Waste The Screen Wake Lock API keeps a display lit while a page is visible. Here is what it can and cannot do, what it costs in battery and panel wear, and when not to bother. 5 min read

Frequently asked questions

Is livetime.now free?

Yes — free, no signup, no download.

How accurate is the clock?

It matches your device's clock, which on a synced machine is typically within a few tens of milliseconds of true time.

Will the screen stay awake?

In fullscreen the page requests a screen wake lock where supported, which keeps a display running unattended.

Can I use it in OBS or on a kiosk?

Yes — add it as a browser source or open it in kiosk mode. The fullscreen page is designed for both.

Are my settings stored?

Format, seconds, colour and size are saved in your browser on that device only. Nothing is uploaded.