Date & Time
Countdown Timer
Set a target date and time and watch the live countdown tick.
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Days
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Hours
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Minutes
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Seconds
Set a countdown timer for any hours, minutes, and seconds and get an alert when time is up. Also includes a stopwatch for timing events. Works directly in your browser — no download needed. Perfect for cooking, workouts, meetings, and study sessions.
Features
Countdown Timer
Set hours, minutes, seconds — get notified when done.
Stopwatch
Start, stop, and lap timer for tracking elapsed time.
Audio Alert
Sound notification when countdown reaches zero.
Presets
Quick-set common durations: 1 min, 5 min, 25 min (Pomodoro).
How to Use the Timer
- Enter hours, minutes, and seconds for your countdown.
- Click Start.
- An alert sounds when the timer reaches zero.
FAQ
Does it work when the browser tab is in the background?▾
Yes — the timer continues running even if you switch tabs. The notification sounds when done.
What is a Pomodoro timer?▾
A Pomodoro is a 25-minute focused work session followed by a 5-minute break. Use our 25-minute preset for the Pomodoro technique.
Timer Tips
- The Pomodoro Technique: 25 min work + 5 min break, repeat 4x, then take a longer break.
- Use the stopwatch for HIIT workouts to time intervals.
- Set a timer before starting a presentation to manage your speaking time.
More Date & Time
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Days Between Dates Calculator
Find the exact number of days between any two dates
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
Day of the Week Calculator
Find what day of the week any date falls on
World Timezone Converter
Convert times across different world timezones instantly
Business Days Calculator
Count business days between dates, excluding weekends and holidays
Date Format Converter
Convert dates between ISO, Unix, MM/DD/YYYY, and all formats
Time Duration Calculator
Add or subtract two time durations in hours, minutes, seconds
ISO Week Number Calculator
Find ISO week number, day of year, quarter, and leap year info
Stopwatch & Timer
Online stopwatch with lap times and a countdown timer — no install needed
Pomodoro Timer
Focus timer using the Pomodoro Technique. 25-min sessions with short and long breaks
Timezone Meeting Planner
Find the best meeting time across multiple time zones with overlap visualization
Date Add/Subtract
Add or subtract days, weeks, months, years from any date.
Meeting Time Planner
Plan meetings across multiple time zones with city-by-city local times.