Timers & Clocks
Interval Timer
Alternate between work and rest phases for workouts, HIIT, Tabata or study sessions — all in your browser.
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Setup
Timers run locally in your browser. No account or upload is required.
Structure your effort with intervals
Interval training is one of the most effective ways to build fitness and focus. Whether you are doing HIIT, Tabata, circuit training or timed study blocks, an interval timer removes the need to watch the clock — it beeps when it is time to switch and tracks your progress across all rounds.
Frequently asked questions
- What is an interval timer?
- An interval timer alternates between work and rest periods for a set number of rounds. It is commonly used for HIIT workouts, Tabata, circuit training and study sessions with timed breaks.
- What is Tabata?
- Tabata is a specific interval protocol: 20 seconds of work followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total). You can select the Tabata preset to set this up instantly.
- Will it alert me when the phase changes?
- Yes. The timer plays a beep when switching between work and rest phases and when all rounds are complete, so you do not need to watch the screen.