Free Tabata Timer - 20/10 Online Timer with Sounds

A Tabata timer runs the 20-seconds-work / 10-seconds-rest x 8-rounds protocol automatically, with sound cues for each switch, so you train instead of clock-watching. This one adds presets and custom ratios.

That's the prescription from Dr. Izumi Tabata's 1996 study - the 2:1 work:rest ratio at maximal intensity produced aerobic and anaerobic gains in four-minute sessions. The asymmetric rest is the point: you start each round under-recovered.

One protocol is exactly 4 minutes (8 rounds of 30 seconds). Real sessions usually stack 2-4 Tabatas with 1-minute breaks - 10-20 minutes total including warm-up.

At true maximal effort, one protocol is a legitimate conditioning dose - that was the study's finding. If you can do three back-to-back without the breaks, the effort wasn't Tabata-maximal.

Tabata is one fixed HIIT prescription (20/10x8). A general HIIT timer takes any ratio - this Tabata timer handles both, and custom work/rest lives one tap away in the timer hub.

Yes - a bell opens each work interval and countdown beeps carry you into every switch. Voice cues and interval-synced music (FitBeats) are in FitVizPro on iOS and FitViz on Android.

Open a preset URL in the TV's browser and run it full-screen - the display stays awake through the final round. For actual casting from a phone or tablet, the FitViz Tv app casts directly; for synced multi-screen classes with the workout displayed alongside, that's the Fit Viz workout display.

Completely - no ads, no account, nothing to install. Built by Fit Viz, whose gym platform also starts free.

Movements you can hit maximally with zero setup: assault bike, row sprints, burpees, air squats, kettlebell swings, mountain climbers. Skill-heavy or heavy-barbell movements break down at true 20/10 intensity.