Free Workout & Interval Timer
Simple HIIT Timer is a free online interval timer for HIIT, Tabata and circuit training. Set your work time, rest time and number of rounds, then start your workout in seconds, with audio cues, an optional start delay and optional spoken coaching.
No account needed. Sign in to save your workout history and sync it across devices. Works offline as an installable web app.
Frequently asked questions
Is this interval timer free?
Yes. Simple HIIT Timer is a free online interval timer. It runs in any browser on your phone, tablet or computer, with no download and no sign-up.
Does the interval timer have sound?
Yes. It beeps and says "work" or "rest" out loud every time the interval changes, so you can train without watching the screen. You can also turn on an optional voice coach for encouragement during work intervals.
Is there a HIIT timer app?
You can install Simple HIIT Timer to your home screen from your browser and use it like an app, even offline. There is nothing to download from an app store.
What settings should I use for interval training?
Beginners often start with 30 seconds of work and 30 seconds of rest for 8 to 10 rounds. For more intensity try 40 seconds on and 20 off, or Tabata: 20 seconds on and 10 off for 8 rounds.
Can I use it as an exercise, gym or circuit timer?
Yes. Any workout that alternates work and rest fits: bodyweight exercises, gym sets, boxing rounds or circuit stations. See the exercise, gym and circuit timers below for ready-made presets.
Does it track my workouts?
Yes. Completed workouts are saved to your history, and you earn medals for workout streaks, active days and total training hours. Sign in for free to sync across devices.
More free timers: Interval Timer · Workout Timer · Tabata Timer · Gym Timer · Circuit Timer · Exercise Timer · Workout Clock