Interval timer
HIIT · Round 1 of 10
Get ready
00:10
Next: work 40 s · total left 09:50
Build any interval workout
An interval timer switches between work and rest for you, so you can keep your eyes off the screen. Set how long you work, how long you rest and how many rounds you do. Add sets with a longer break between them, a short warm-up countdown before the first round and a cool-down at the end.
The round bar shows every interval at a glance, and the line under the clock tells you what comes next – “Next: rest 10 s”. Big colours change with the phase, so you can read it from across the room.
Voice cues and beeps
A voice says “work”, “rest” and the round number, with a 3-2-1 beep before each switch and a halfway call on long rounds. Turn voice off and keep only the beeps if you train with music. Everything runs in your browser, even offline.
Tabata – 20 s work / 10 s rest × 8. HIIT – 40 s / 20 s × 10. Boxing – 3 min rounds / 1 min rest × 12. EMOM – every minute on the minute × 10. Plank – 60 s hold / 30 s rest × 3.
Questions
What is an interval timer?
A timer that repeats work and rest periods for a set number of rounds and signals each switch, so you can train without watching the clock.
Can I save my own workout?
Yes. Your last plan is saved in this browser, and the link in the address bar contains the plan, so you can bookmark it or send it to a friend.
Does the timer keep running if the screen turns off?
The page keeps the screen awake while a workout runs. The time is based on the real clock, so it stays accurate even if the tab goes to the background.
Can I skip or repeat an interval?
Yes. Use the next and previous buttons to jump to the next interval or back to the start of the current one.