How TimerMo Works
Set any duration, pick a calming alarm, and press start. No downloads, no sign-up — just open the page and you’re timing.
Features
Custom Countdown
Any duration, up to 99 hours.
Pomodoro Mode
Classic 25 / 5 / 15 in one tap.
Eight Calming Tones
Synthesized in your browser.
Count Up Timer
Track elapsed time to a target.
Light & Dark Themes
One tap. Preference remembered.
Reminder Messages
Custom note when time’s up.
The Pomodoro Technique
Developed by Francesco Cirillo in the late 1980s, the Pomodoro Technique breaks work into focused intervals: twenty-five minutes of concentration, followed by a five-minute break.
Every four cycles, take a longer fifteen-minute rest. TimerMo’s Pomodoro Mode gives you all three intervals in a single tap.
Perfect For
Frequently Asked Questions
Yes. TimerMo is completely free with no account requirement and no usage limits. Run as many timers as you want, for as long as you want.
No installation is required. TimerMo runs entirely in your web browser on any device — desktop, tablet, or phone. Just open the page and start timing.
Yes. The countdown continues accurately in the background using timestamps, not interval ticks, so it remains precise even if your browser throttles inactive tabs. When you return, the display refreshes instantly to show the correct remaining time.
Yes — you can preview and switch between any of the eight alarm tones at any point until the final sixty seconds, when settings lock to prevent accidental changes near the finish.
Pomodoro Mode swaps the standard preset buttons for three quick options based on the Pomodoro Technique: a 25-minute Pomodoro (work session), a 5-minute Short Break, and a 15-minute Long Break. You can still set any custom duration by clicking the time display.
Once the page has loaded, the timer functions without an internet connection. All alarm sounds are synthesized locally in your browser using the Web Audio API, so no audio files need to be downloaded.
Explore More from TimerMo
More free clocks and timing tools, all built with the same attention to detail.