Free · No sign-up · Works in any browser

Online Interval Timer

Set your work, rest and rounds, press start, and train. Beeps count down the last 3 seconds and a voice calls every round, so you never have to look at the screen.

Warm-up

Round 1 of 8

Ready · 04:00 total · 8 rounds

00:10
NextWork00:20
How it works

Start an Interval Workout in 10 Seconds

No account and no download. The timer runs right on this page, on your phone, laptop or gym TV.

  1. 1

    Pick a preset or set your own

    Tap Tabata, HIIT, Boxing or EMOM, or set work, rest, rounds and warm-up yourself. Hold + or − to change values fast.

  2. 2

    Press start and train

    The big countdown changes colour by phase: orange for warm-up, red for work, dark blue for rest. Beeps mark the last 3 seconds.

  3. 3

    Go full screen

    Press F or the full-screen button to turn any screen into a gym clock. The screen stays awake while the timer runs.

Workout formats

One Timer for Every Interval Format

Each preset follows the standard structure of the format. Open a guide for setups, variations and tips.

Tabata Timer App for 20/10 Workouts

20 seconds all-out, 10 seconds rest, 8 rounds: the classic 4-minute Tabata protocol.

Open Tabata Timer App for 20/10 Workouts guide →

HIIT Timer App for Work and Rest Intervals

40/20 × 10 by default. Change it to 30/15, 45/15 or any work-to-rest ratio for circuits.

Open HIIT Timer App for Work and Rest Intervals guide →

Boxing Round Timer App for 3 Minute Rounds

3-minute rounds with 1-minute rest, 12 rounds, like a pro fight. Good for bag work, pads and sparring.

Open Boxing Round Timer App for 3 Minute Rounds guide →

EMOM Timer App for CrossFit Workouts

Every minute on the minute: one 60-second interval per round. Finish your reps and rest for what's left.

Open EMOM Timer App for CrossFit Workouts guide →
Why this timer

Built Like the App, Free in Your Browser

Sound and voice cues

A 3-2-1 countdown beep, a distinct tone for work and for rest, and a voice that calls each round in your language.

Stays accurate

The timer follows the real clock, not a counter, so it doesn't drift, even if you switch tabs or your phone gets busy.

Shareable workouts

Copy a link to your exact setup and send it to a training partner or your class. It opens ready to start.

Keyboard and full screen

Space to start or pause, → to skip, R to reset, F for full screen. Your last workout is remembered on this device.

Take Your Timer Offline

The free Workout Timer app does everything this page does, plus:

  • Saved templates with multiple activities and sets
  • Runs with the screen off and in the background
  • Workout history, streaks and a Wear OS app
Get it on Google Play
FAQ

Online Interval Timer: Questions

Quick answers about using the timer in your browser.

Is this online interval timer free?
Yes. It's completely free, with no sign-up and no limits on workouts or rounds. The page is supported by ads, which are kept away from the timer controls.
Does the timer keep running if I switch tabs?
Yes. The timer is based on the real clock, so it stays accurate in a background tab and the beeps still play. On phones, keep the page open: some mobile browsers pause pages when the screen turns off. For screen-off training, use the free app.
Why don't I hear any sound?
Browsers only allow sound after you interact with the page, so audio starts when you press Start. Check that Beeps is on (the speaker icon), that your device isn't on silent, and that the tab isn't muted.
Can I save or share my workout?
Your last settings are saved automatically on this device. Use 'Copy link to this workout' to share the exact work, rest, rounds and warm-up with anyone.
What's the difference between the online timer and the app?
The online timer runs one interval block (work, rest, rounds) in your browser. The Android app saves unlimited templates with several activities and sets, runs with the screen off, tracks your history and works on Wear OS.
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