Countdown Timer
Last updated: June 1, 2026Set a timer with an alarm.
Countdown Timer is a free online tool to set a timer with an alarm. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Countdown Timer
The Countdown Timer counts down from any duration and sounds an alarm when it reaches zero, with one-tap presets for common times. Perfect for cooking, workouts, study and focus. Free and runs entirely in your browser.
- 1Set hours, minutes and seconds (or tap a preset).
- 2Press Start.
- 3An alarm sounds when the timer hits zero.
Alarm at zero
A clear beep tells you when time's up.
Quick presets
One-tap 1, 3, 5, 10, 15 and 25-minute timers.
Free & private
Runs on your device with no sign-up.
Countdown Timer — frequently asked questions
Will the alarm sound if the tab is in the background?
In most browsers, yes — keep the tab open. Some mobile browsers throttle background audio, so leaving the tab visible is most reliable.
Can I set a 5 or 10 minute timer quickly?
Yes — tap the preset buttons for instant 1, 3, 5, 10, 15 or 25-minute timers.
Is it free?
Yes, completely free.
Share this tool
Send it to someone who needs it or save the link for later.
More developer tools
View allPomodoro Timer
25-minute focus, 5-minute breaks.
Random Number Generator
Random numbers in any range.
Random Picker
Pick a random name or shuffle a list.
Dice Roller
Roll virtual dice (d4–d100).
Password Strength Checker
Test how strong a password is.
Roman Numeral Converter
Numbers to Roman numerals and back.