HIIT Interval Timer
Free HIIT and Tabata interval timer with prepare, work, rest, rounds, and Web Audio beeps. Custom workouts in your browser.
Loading tool...
What is HIIT Interval Timer?
The HIIT Interval Timer is a free browser workout clock for prepare, work, and rest phases across multiple rounds, with optional Tabata and HIIT presets and Web Audio beeps.
Key Benefits
- Follow Tabata or HIIT ratios without a gym console
- Hear phase-change and 3-2-1 countdown beeps
- Skip a phase or mute audio mid-session
- Keep the recipe on-device with no login
Common Use Cases
- •Tabata bodyweight circuits at home
- •Treadmill or bike HIIT 40/20 sets
- •Boxing or jump-rope round timers
- •Coaching a class with a shared screen timer
How to Use the HIIT Interval Timer
- Choose a preset: Select Tabata 20/10, HIIT 40/20, or HIIT 30/30, or leave custom values.
- Set phases: Enter prepare, work, and rest seconds plus how many rounds you want. Rest after the last work interval is skipped.
- Start the timer: Press Start or Space. Beeps mark phase changes and the last three seconds of each phase. Mute if needed.
- Skip or reset: Skip jumps to the next phase. Reset returns to the first phase with the same recipe.
Key Features
- Tabata 20/10, HIIT 40/20, and 30/30 presets
- Custom prepare, work, rest, and round counts
- Web Audio beeps for phase changes and 3-2-1 countdowns
- Skip, pause, mute, and overall plus per-phase progress
- Runs locally in the browser with no account
Frequently Asked Questions
What is a Tabata interval?
Classic Tabata is eight rounds of 20 seconds of work and 10 seconds of rest, often with a short prepare countdown first. This preset matches that 20/10 pattern.
Why is there no rest after the last round?
The rest phase sits between work intervals. After the final work interval the session ends so you are not waiting on a rest you no longer need.
Does this play sound if my phone is silent?
Beeps use the Web Audio API in this tab. If the browser or OS blocks audio, enable sound for the page or use the visual phase labels and progress bars.
Is any workout data uploaded?
No. Durations, rounds, and audio stay in your browser. There is no account and no server-side timer.