Why Use This Tabata Timer?
People reach for this tool for four-minute Tabata workouts, HIIT intervals at home, and any 20/10 interval training. It loads instantly, works on phones, tablets, and computers, and needs no account or installation.
Everything runs locally in your browser — there is no server to trust with your data and nothing to configure. Open the page and the tool is ready.
Presets and Custom Durations
Common durations are one tap away as preset buttons. Need something else? Enter an exact duration and start the countdown immediately.
When the countdown ends you get a clear beep, and you can restart the same duration with a single tap on Reset.
The Tabata protocol, where it came from
Tabata is not a generic HIIT format — it is a specific protocol from a 1996 study by Izumi Tabata: 20 seconds at absolute maximum effort, 10 seconds of rest, eight rounds, four minutes total. The original subjects were trained athletes on stationary bikes, and 'maximum effort' in the study meant anaerobic collapse territory. That precision matters because the protocol's famous results — simultaneous gains in aerobic and anaerobic capacity in four minutes — came from that intensity, not from the timing alone.
In popular practice, Tabata has broadened to any 20/10 interval with bodyweight moves: burpees, squats, sprints, kettlebell swings. The timing still does the work — 10 seconds is too short to fully recover, so effort quality decays predictably across the eight rounds — but the honest version of the workout is four very uncomfortable minutes, not a relaxed circuit. The different beeps for work and rest on this page exist so you never have to look at a screen mid-burpee.