Countdown Timer

Set a timer for any duration. Get an alert when time is up.

Stopwatch

Precise stopwatch with lap tracking and millisecond accuracy.

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.