HIIT Timer for Custom Work and Rest Intervals

Build a precise interval workout with editable work, recovery, warm-up, and cooldown periods. This HIIT timer keeps the active phase, round, and full-session progress visible at a glance.

Workout setup

40s work · 20s rest · 8 rounds

10:00 total

Interval workout

Ready

8 rounds

Next: Ready

01:00

Settle in, check your space, then start.

Phase 0%Workout 0%

Space: start/pause · R: reset · Settings lock after start

How This HIIT Timer Supports Better Pacing

High-intensity interval training alternates demanding efforts with planned recovery. A HIIT timer removes clock-watching, so you can concentrate on safe movement quality and a repeatable pace. Choose a preset or set each interval yourself; the session estimate updates before you begin. Unlike a basic stopwatch, this interval timer announces every transition, shows the next phase, and measures overall workout progress. Each selected round includes one work period and the chosen recovery period when it is above zero, while optional warm-up and cooldown blocks sit outside the rounds.

Choose Intervals You Can Repeat

Start conservatively if the movement or format is new. A 30-second effort followed by 30 to 60 seconds of recovery is easier to repeat with steady form than an all-out opening round. The Tabata preset uses the familiar 20/10 pattern, but that ratio does not make every exercise appropriate for maximal effort. Use the HIIT timer as a pacing cue, not a command to ignore pain, dizziness, or unusual shortness of breath. The warm-up and cooldown fields make preparation part of the recorded plan instead of an afterthought. Since the timer runs locally in your browser, no account or workout data upload is required.

HIIT Timer FAQ

What is a good HIIT timer interval for beginners?

Try 20 to 30 seconds of controlled work with 40 to 60 seconds of recovery for four to six rounds. Increase work or reduce rest only when you can maintain technique across the final round.

Does this online HIIT timer keep time in a background tab?

Yes. It checks the target end time rather than trusting every browser tick, so returning from another tab corrects the display and advances any interval that has ended.

What does the Tabata HIIT timer preset include?

It schedules eight rounds of 20 seconds of work and 10 seconds of recovery. Warm up separately, choose suitable movements, and avoid treating a preset as individualized medical or coaching advice.

Can I use the interval timer without sound?

Yes. Turn sound off in the setup card. The phase color, large countdown, round counter, and progress bar continue to provide clear visual transitions.

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