15 Minutes Timer — Free Online Countdown | TimerRushFree 15 minutes countdown timer with millisecond precision. Works instantly in any browser. Bookmark /t/15m for one-click access.Frequently asked questionsWhat is a 15m timer useful for?A 15m timer is great for focused work sessions, cooking, or HIIT workouts. Start it and focus — the alarm signals when time is up.Does the timer keep running if I switch tabs?Yes — TimerRush continues counting down in the background and plays an alarm when finished.Can I bookmark this timer?Yes. Bookmark this page to return to this exact timer instantly. No account or signup needed.Is TimerRush free to use?Completely free. No account, no download, no ads. Works in any modern browser on any device.