Does the countdown keep running if I switch to another browser tab?

Yes. The timer calculates remaining time from a target timestamp using Date.now() on every frame, so it stays accurate even when the browser throttles background tabs.

Do I need to be online for the countdown to work?

Only to load the page. Once MakeMyTimer has loaded in your browser, the countdown timer runs fully client-side and does not contact any server.

Why do I need to click the sound toggle before I can hear the alert?

Web browsers block audio until the page receives a user gesture. Clicking the sound toggle creates the AudioContext inside a click handler, which is why the first click is required before sound works.

What is the longest countdown I can set?

You can enter up to 99 hours, 59 minutes, and 59 seconds in a single countdown — roughly four days.

Countdown Timer

Set a countdown and get alerted when time is up. Works even when the tab is in the background.

Hours

Minutes

Seconds

00:05:00

Stopwatch

Precise stopwatch with lap tracking and millisecond accuracy.

Timezone Converter

Convert times between any IANA timezones with DST awareness.

Pomodoro Timer

Work in focused intervals with automatic break scheduling.

World Clock

Track the current time in multiple cities at a glance.

Unix Timestamp Converter

Convert Unix epoch timestamps to dates and back, in seconds or milliseconds.

Age Calculator

Calculate exact age in years, months, days, hours, and seconds.

Date Calculator

Add or subtract from a date, or measure the duration between two dates.

Interval Timer (HIIT)

Run work/rest intervals for HIIT, Tabata, and circuit workouts.

Alarm Clock

Set multiple alarms with labels, audio, and desktop notifications.

Meeting Planner

Find the best meeting time across timezones on a 24-hour overlap grid.

Sunrise & Sunset

Calculate sunrise, sunset, twilight, and golden hour for any location.

Chess Clock

Two-player chess clock with Fischer increment and Bronstein delay.

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