Online Timer — Multiple Timers, Pomodoro & Interval

A free online timer that runs entirely in your browser. Start several labeled countdowns side by side, switch to a Pomodoro work-and-break cycle, or program a HIIT/Tabata interval routine for workouts. Includes a fullscreen display for classrooms and meetings, six selectable alarm sounds, and timing that stays accurate even when the tab is in the background.

How to Use the Online Timer

Pick a mode

Choose Timer for one or many countdowns, Pomodoro for focused work sessions, or Interval for workouts.

Set the time

Type hours, minutes, and seconds — or tap a quick preset. Give each timer a label so you know what it is for.

Start it

Press Start. Add more timers and they all run in parallel, each with its own ring and countdown.

Choose your alarm

Open the sound panel to pick an alarm tone, preview it, and decide whether it rings once or until you dismiss it.

Stay on time

Use fullscreen for a big display, turn on Keep Screen On, or open the mini player to watch the countdown from another tab.

Run several countdowns at once, focus with Pomodoro, or train with intervals

Timer finished

Hours

Minutes

Seconds

Quick presets

Add a timer above to get started

Features

Up to 8 labeled countdown timers running at the same time Pomodoro mode with customizable focus, break, and long-break cycles Interval (HIIT/Tabata) builder with prep, work, rest, rounds, and cooldown — save your routines Fullscreen display and a Picture-in-Picture mini player that floats over other tabs Six alarm sounds with preview, plus ring-once or ring-until-dismissed Background-accurate: a Web Worker keeps the countdown on time even when the tab is hidden

Frequently Asked Questions

Can I run more than one timer at the same time?

Yes. The Timer mode lets you run up to 8 labeled countdowns in parallel — handy for cooking several dishes, managing tasks, or timing a game. Each timer has its own ring, label, and alarm.

Will the timer keep accurate time if I switch to another tab?

Yes. The countdown is driven by a Web Worker and an absolute end-time, so it stays accurate and the alarm fires on time even when the tab is in the background — where a normal page timer would be slowed down by the browser.

What is the difference between Pomodoro and Interval mode?

Pomodoro alternates focused work (default 25 min) with short breaks and a longer break every few rounds — great for studying or deep work. Interval mode is for workouts: it cycles work and rest periods over a set number of rounds (HIIT/Tabata) with a prep countdown and optional cooldown.

Can I change the alarm sound?

Yes — open the sound panel and choose from six built-in sounds (Bell, Digital Beep, Chime, Marimba, Siren, Soft). Each can be previewed, and you can set it to ring once or keep ringing until you dismiss it.

Does it work on phones and tablets?

Yes, on both iOS and Android. Keep the browser tab open and, for the most reliable alerts, turn on Keep Screen On and allow notifications.

Can I save an interval routine?

Yes. Configure your prep, work, rest, rounds, and cooldown, then press Save routine to store it in your browser and reload it with one tap next time.

Do I need to install anything?

No installation is needed — the timer runs in your browser and works offline once the page has loaded. The alarm sounds are generated on the fly, so there are no downloads.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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Who is this tool for?

🎓 Students 🧘 Wellness & Meditation 🏃 Sports & Athletics 📋 Productivity

Published 13 Jun 2026