How do I set up a Tabata timer?

Press the "Tabata 20/10 ×8" preset. It fills in a 10 second warm-up, 20 seconds of work, 10 seconds of rest, 8 rounds and 1 set, which is 4 minutes in total. Then press "Start". You can change any number afterwards.

What are rounds, sets and "Rest between sets"?

A round is one work period followed by one rest. A set is a group of rounds. After the last round of a set, "Rest between sets" is used instead of the normal rest, and nothing follows the very last round. Set a rest to 0 to skip it. Rounds go up to 99, sets up to 20 and the warm-up up to 300 seconds.

How do the beeps and voice cues work?

Beeps are short tones made in your browser: a longer high one when work starts, a lower one for rest and warm-up, quick beeps for the last three seconds of a phase and three rising tones at the end. "Voice cues" speak the name of each phase using your device's speech voices. Both can be switched off, and voice is off by default.

Will the screen stay on while I train?

Where your browser supports it, the page asks to keep the screen awake while the timer runs and releases it when you pause, reset or finish. The clock follows the real time, so a late update does not make it drift. Keep the tab open, because some phones mute sound in the background.

Are my settings saved?

Yes. Your times, rounds, sets and the sound options are saved in this browser's local storage so they are there next time. They are not put in the page address and nothing is uploaded. Clearing your site data removes them.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install.

⏱️

Free Interval Timer

A work and rest timer for HIIT and Tabata workouts with warm-up, rounds, sets, a big countdown, colour-coded phases, beeps and optional voice cues.

Runs in your browserNo sign-up, no pop-upsNo login requiredFree foreverTabata and HIIT presetsBeeps and voice cuesKeeps the screen on

Ready

0:10

Total 4:00

Presets

Warm-up (s)

Work (s)

Rest (s)

Rounds

Sets

Rest between sets (s)

BeepsVoice cues

🔒 Your settings stay in this browser. Nothing is uploaded or put in the page address.

How It Works

The page builds a list of timed phases from your numbers and counts them down against the device clock, so the timing stays accurate. Beeps are made with WebAudio.

1
Choose a plan
Pick a preset such as "Tabata 20/10 ×8", or type your own "Warm-up (s)", "Work (s)", "Rest (s)", "Rounds", "Sets" and "Rest between sets (s)".
2
Set the sound
Tick or untick "Beeps" and "Voice cues". Voice speaks the name of each phase.
3
Start
Press "Start". The big number counts down, and the colour changes between work, rest and set rest.
4
Pause or skip
Use "Pause" and "Resume", "Skip" to jump to the next phase, or "Reset" to stop and start over.

Your settings stay in this browser. Nothing is uploaded or put in the page address.

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Frequently Asked Questions