Clocks & Timers

Free online alarm clock with timer, stopwatch, Pomodoro, and world clock. 12 alarm sounds, math puzzle dismiss, screen awake.

Free online timer: run several labeled countdowns at once, plus Pomodoro and HIIT interval modes, fullscreen, and alarm sounds.

Six clock types with educational guides and timezone support.

Precise online stopwatch with laps, splits, sparkline and shareable link

Live countdown timer to any date with themes, full-screen and shareable link

Set a duration and watch the sand run through the glass.

Count days since the last incident, track your record, and show it full-screen, in print or by link.

Convert Unix timestamps to ISO 8601, UTC, RFC 2822 and relative time, or any date back to epoch seconds. Batch mode and live counter. Free.

Convert between 24-hour military time and 12-hour AM/PM format with live sync, batch mode and reference chart.

Light a virtual candle and observe a moment of silence to honor someone's memory. Timer, ambient sounds, personalization.

Visual time awareness tool with color-coded countdowns for ADHD time blindness.

Free chess clock for two players on one device — Bullet, Blitz, Rapid, Classical with Fischer, Bronstein and delay modes.

Set multiple cooking timers with preset recipes and sound alerts.

Free age calculator: your exact age in years, months, days, hours, minutes, seconds — plus next birthday countdown. Free, in-browser.

Days between two dates, business days and holidays

See exactly how many days you have lived since birth — with weeks, hours, a live counter, milestone dates and your life in weeks. Free.

Free work-hours calculator: enter shifts with start, end and breaks, get weekly totals, overtime and pay. Export CSV. Free, in-browser.

Convert dates between Julian (old style) and Gregorian (new style) calendars. Automatic shift per era, Orthodox feasts, Easter dates. Free.