Who this helps
- People timing study or work sessions
- People needing a short countdown
Date Utility
Timer
An online countdown timer for studying, work, exercise, cooking, breaks, and Pomodoro focus sessions. Supports repeat timer, sound alerts, browser notifications, share links, and focus mode.
Focus Timer
Set hours, minutes, and seconds for countdowns.
Pomodoro Mode
Automatically switch between 25-minute focus and 5-minute breaks.
Save & Share
Save recent timer settings and copy share links.
Timer Settings
Enter a time manually, use quick buttons, or select Pomodoro mode.
Normal Timer
00:05:00
The timer is ready to start.
Quick Time Settings
Advanced Options
Mode Selection
Recent Timer Settings
Quickly reload recently used timer durations.
No recent timer records yet.
Set a countdown, pause it and plan a focus session
Use a custom countdown or choose the 25-minute focus and 5-minute break presets. Sound, notifications and repeat are separate options. Keep the page available while timing and test your notification settings before relying on an alert.
When to use this tool
- Run a 90-second practice interval.
- Alternate a focused task with a short break.
From input to a checked result
- 1
Enter hours, minutes and seconds, or choose a preset.
- 2
Select sound, notifications or normal-mode repeat if needed.
- 3
Press Start; use Pause to stop and Start to resume.
- 4
After a focus session switches to a break, press Start to begin the break.
A shared 90-second countdown
- Input
- Hours: 0 · Minutes: 1 · Seconds: 30 Mode: normal
- Result
- 00:01:30, waiting for Start
The share link restores the duration and mode. It does not start automatically or share a running countdown.
End of a focus session
- Input
- Focus mode · 25 minutes
- Result
- After completion: 00:05:00 break, waiting for Start
The mode changes after a short delay. The next session needs a new Start click.
How it works
Hours are limited to 0–99 and minutes/seconds to 0–59. While running, the timer subtracts elapsed time reported by performance.now(), rather than assuming each interval callback occurs exactly on time. Normal mode can repeat after finishing. Focus and break modes switch presets without starting the next session automatically.
Limitations
- Background tabs, device sleep and browser restrictions can delay updates or alerts.
- Closing or reloading the page does not restore a running countdown.
- Notifications require browser support and permission; sound can be restricted by browser or device settings.
- The fractional display shows hundredths of a second; it is not a guarantee of measurement accuracy.
Your data
The tool keeps up to 12 recent duration/mode settings in this browser’s localStorage. Shared URLs contain the entered duration and mode, but not remaining time or the sound, notification and repeat switches.
References
Related tools
- D-Day Calculator
Count calendar days until an event.
- Unit Converter
Convert hours, minutes and seconds.
Frequently asked questions
Will the break start automatically?
No. A completed focus session switches to the five-minute break preset; press Start when you are ready.
What does the Repeat option do?
In normal mode it starts the same duration again after a short pause. Focus/break modes follow their preset-switching behavior instead.
Why did the alert arrive late in the background?
Browsers and operating systems may throttle timers or suspend a page. Keep the page open and check the device’s notification and sound permissions.