Interval Timer
HIIT, workout, and exercise interval timer with rounds and rest tracking.
00:30
Work — Round 1/5
Why Use Our Interval Timer?
- Independent work and rest interval lengths
- Configurable rounds, warm-up, and cool-down
- Audio and visual cues so you don't need to watch the screen
- Works for HIIT, Tabata, circuit training, or any custom routine
- No signup, runs entirely in your browser
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View all Time ToolsFrequently Asked Questions
- Can I set different lengths for work and rest intervals?
- Yes — work and rest intervals are set independently, so you can build anything from a 20-second Tabata round to a longer circuit-training interval.
- Does it support warm-up and cool-down periods?
- Yes — you can add a warm-up before the first round and a cool-down after the last, separate from your regular work and rest intervals.
- Will I get an alert when an interval ends?
- Yes — the timer gives audio and visual cues at each transition, so you can keep your eyes off the screen during a set.
- How many rounds can I set?
- There's no meaningful cap — set as many rounds as your routine needs, and the timer will cycle through work and rest for each one.
- Is my data sent anywhere?
- No. The timer runs entirely in your browser — nothing is uploaded or stored on a server.