Interval Timer
Set workout and rest seconds, repeat rounds, and hear phase alerts. Pause or resume your interval timer. Keep the browser page open.
Repeat work and rest intervals
Set work seconds, rest seconds and the number of rounds. Thirty seconds of work, fifteen seconds of rest and eight rounds takes five minutes and forty-five seconds. The final work period ends the workout without an extra rest period.
Pause and resume the remaining interval, or reset to the first round. A short sound announces phase changes. Test volume before exercise and keep the page open. Device sleep and background restrictions may delay sounds.
Frequently asked questions
Keep this page open for alarms, timers and focus notifications. Sleep mode, background restrictions and muted devices can delay or silence an alert. Use Test sound first. Stopwatch shortcuts: Space to start or pause, L for a lap. Timer links share a duration or a target date; they do not share your private records.
Time is based on your device clock. It is not independently synchronized to an official time server.