HIIT
HIIT Timer
Free HIIT timer: automatically alternates work and recovery across your chosen rounds, with audio cues and fullscreen.
Work
00:20
Sound
Display
Use cases
HIIT sessions
Set your work/rest intervals (30/30, 40/20…) and let the timer roll through the rounds for you.
Cardio and circuit training
Great for circuits, home intervals or conditioning: a beep marks every transition.
Warm-up and core work
Pace short blocks of warm-up, planks or active mobility.
Group coaching
Show the timer fullscreen for a class so everyone follows the same rhythm.
FAQ
HIIT vs. Tabata — what's the difference?
Tabata is a fixed HIIT format (20s/10s × 8). The HIIT timer lets you freely set work, rest and rounds — see the Tabata timer for the fixed format.
Which intervals should beginners use?
Start with 30s work / 30s rest over 8 rounds, then shorten the rest once it feels too easy.
Are there audio cues?
Yes, a beep marks every phase change so you can keep your eyes on the exercise.
Does it work on mobile?
Yes, in your phone browser. Keep the screen on and the tab active during the session.
Discover our other tools
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Classic 20/10 protocol for eight rounds.
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Pomodoro Timer
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