Calculators
Single Timer
Set hours/minutes/seconds and count down — a sound and the tab title let you know when it's done.
타이머, 단일 타이머, 카운트다운 타이머, 알람 타이머, timer, countdown timer, online timer- Created
- 2026.08.29
- Updated
- 2026.09.15
Single Timer
Waiting05:00
Set to5m
Ends at—
Progress0%
Duration
Changing this resets to the starthms
Notifications
Shortcuts
Space Start/stopR ResetM Mute
Settings are stored only in this browser. The remaining time shows in the tab title even when you’re on another tab, and time that passed while the screen was off is caught up using the real clock. Sounds are synthesized in your browser, so nothing is downloaded.
Tools that pair well with this oneBrowse all tools
CalculatorsRepeat TimerRepeats the same duration automatically, with an optional rest between rounds — set rounds or run forever.
CalculatorsIrregular TimerA timer that runs segments of different lengths in order — like 3 minutes, then 2, then 5 — playing a sound at the end of each one and looping back to the start when the list finishes.Favorites Ctrl + N
How to use
1.
Enter hours, minutes, and seconds — it takes effect right away.
2.
Click "Start" to begin the countdown. You can pause and resume, and adjust the remaining time on the fly with the −1m/+1m/+5m buttons.
3.
When time's up, your chosen sound plays, and the remaining time shows in the tab title so you notice even on another tab.
Related updates View all
FAQ
Tool info
Category Calculators
Processing Directly in your browser
Data storage Stored only in this browser
Created 2026-08-29
Updated 2026-09-15