Online Clock & Time Tools - Free Clock, Timer, Stopwatch & World Clock | SmartToolsHub

Online Clock & Time Tools

Check the current time, set alarms, use timers, track time and convert time zones with free online tools.

Search Time Tools

Clock Alarm Timer Stopwatch World Clock Pomodoro Time Zone

--:--:--

 

Local Time • Detecting timezone…

Settings

Show seconds

Show date

Night mode

Large clock

World Clock

Live local time in major cities around the world, calculated directly in your browser.

Search cities

Alarm Clock

Hour

Minute

AM/PM AM PM

Alarm title (optional)

Alarm sound Classic Beep Soft Chime Alert Siren

Repeat Once Daily Weekdays Custom days

Browser audio depends on your device volume and browser permissions. Keep this tab open and unmuted for the alarm to sound.

Countdown Timer

Hours

Minutes

Seconds

00:05:00

Stopwatch

00:00:00.00

Pomodoro Timer

Work (minutes)

Short break (minutes)

Long break (minutes)

25:00

Completed work sessions today: 0

Time Difference Calculator

Start time

End time

Enter two times to see the difference.

Date Difference Calculator

Start date

End date

Enter two dates to see the difference.

Time Unit Converter

Value

From Seconds Minutes Hours Days Weeks

To Seconds Minutes Hours Days Weeks

1 Minute = 60 Seconds

Time Zone Converter

Date

Time

From city / time zone

To city / time zone

Select two time zones to convert a time.

How to Use the Online Clock Online Alarm Clock Online Timer Online Stopwatch World Clock Time Zone Converter Pomodoro Timer Frequently Asked Questions

How to Use the Online Clock

This page reads the time directly from your device, so the clock at the top always matches your computer or phone's system clock. Switch between 12-hour and 24-hour display using the toggle above the clock, and turn the date or seconds on and off from the Settings panel if you want a simpler view. Because everything runs in your browser, the clock keeps ticking accurately even on a slow connection, and nothing is sent to a server.

Online Alarm Clock

The alarm clock lets you pick a time, give it an optional label, and choose how often it should repeat — once, every day, weekdays only, or a custom set of days you select yourself. When the alarm time arrives, a notification appears directly on this page along with a tone you can stop with one tap. Because the sound plays from your browser rather than a phone app, keep this tab open and your device unmuted so you don't miss it.

Online Timer

Set a countdown in hours, minutes and seconds for cooking, workouts, study sessions or timed breaks. The timer is built on the actual clock time rather than a simple counter, so it stays accurate even if the browser tab is minimized or the page redraws slowly. Pause and resume as needed, and reset instantly when you want to start over.

Online Stopwatch

The stopwatch measures elapsed time down to hundredths of a second using your browser's high-resolution timer, which is far more consistent than counting with a basic interval. Use Lap to record split times during a run, workout or practice session, and review every lap in the list below the display.

World Clock

The world clock shows the current local time in major cities including Karachi, Islamabad, Lahore, Dubai, Riyadh, Doha, London, Paris, Berlin, New York, Chicago, Los Angeles, Toronto, Tokyo, Singapore, Sydney and Beijing. Each card updates every second using standard time zone data built into your browser, so results reflect real daylight saving rules automatically. Type a city name in the search box to filter the list quickly.

Time Zone Converter

Planning a call across countries? Pick a date and time, choose a starting city, and select the destination city to see the converted local time instantly. This is useful for scheduling meetings, flights or calls without doing the math yourself, and it automatically accounts for each region's current offset from UTC.

Pomodoro Timer

The Pomodoro Timer breaks work into focused intervals — 25 minutes by default — followed by short breaks, with a longer break after a few rounds. Adjust the work, short break and long break durations to match your own rhythm, and keep an eye on your completed session count to track how much focused work you've done today.

Frequently Asked Questions

An online clock is a browser-based tool that displays the current time using your device's system clock, without needing to install any app.

Yes. The clock reads your device's local time and timezone automatically using your browser's built-in time zone detection.

Once the page has loaded, the alarm, timer and stopwatch all run using your device's clock and don't need an active internet connection to keep counting. Keep the tab open so the alarm can still sound.

Yes, every tool on this page is fully responsive and works on Android and iPhone browsers, including touch-friendly buttons and inputs.

Yes. Use the Fullscreen button above the main clock to display it full-screen, which is handy for desks, classrooms and presentations.

The stopwatch uses your browser's high-resolution timer, which is accurate to hundredths of a second and doesn't drift the way simple counters can.

It uses standard time zone data built into your browser to calculate the correct local time in the destination city, automatically accounting for daylight saving where it applies.

More Free Tools on SmartToolsHub

Looking for something else? Check out our Age Calculator, BMI Calculator, Countdown Timer, Percentage Calculator and Date Calculator.