HIIT Interval Timer

High-Intensity Interval Training (HIIT) alternates short bursts of intense exercise with recovery periods. This timer lets you customize work/rest intervals, rounds, and preparation time so you can follow any HIIT protocol without distractions. Whether you're doing Tabata, sprint intervals, or bodyweight circuits, the visual and audio cues keep you on track.

Absolutely! Our HIIT timer is fully responsive and mobile-friendly. The large display and touch-friendly buttons make it easy to use during workouts. We recommend keeping your device screen on or using a stand for best visibility.

Popular protocols include Tabata (20s work / 10s rest ×8 rounds), 30-30 (30s each ×10), and 45-15. Beginners may start with longer rest (e.g., 30s work / 30s rest) and fewer rounds. Our presets let you jump right in, or you can create your own custom intervals.

Yes, this page is a static web tool. Once loaded, it runs entirely in your browser without needing an internet connection. You can even save it as a bookmark for quick access.

Currently the timer uses a built-in beep sound. You can toggle sound on/off using the switch above. Future updates may include custom sound options. In the meantime, most devices will play a short beep through the system audio.

You can set a preparation time (up to 30 seconds) before the first work interval begins. For cool-down, you can manually keep time after the final round, or we plan to add a dedicated cool-down timer in a future version.