25 Minute Timer — Start Immediately, No Signup
Free online 25 minute timer
Click Start above to begin your 25-minute countdown. The timer runs in your browser tab, plays an alarm when time's up, and keeps counting accurately even if you switch to another app.
25 minutes is the foundation of the Pomodoro Technique — the most widely used time management method for focused work. Whether you're studying, writing, coding, or working through a task list, 25 minutes is proven to be long enough for meaningful progress and short enough to maintain full concentration.
How to use this 25 minute timer:
Click Start — the timer begins immediately
Work without interruption until the alarm sounds
When the alarm rings, take a 5-minute break
Repeat 3–4 times, then take a longer 15–30 minute break
Use the task list to stay organized across multiple sessions
Need a customizable pomodoro timer?
This page runs a full Timerbox pomodoro session. If you want to customize the duration, use the Settings panel — you can set any focus length, short break, and long break duration. Automatic break timers, task tracking, session stats, and ambient sounds are all included.
FAQ
Q: Can I set this timer to repeat automatically?
Enable "Auto-start breaks" and "Auto-start pomodoros" in Settings for automatic work/break cycling.
Q: Will the alarm sound if my phone screen is locked?
On most Android browsers, yes. On iOS Safari, the alarm may require the screen to be active. For reliable mobile alerts, install Timerbox as a PWA via "Add to Home Screen."
Q: Can I use this as a classroom timer?
Yes — the large display and clear alarm make it suitable for classroom use. The fullscreen-capable browser tab works well on a projector or display screen.
25 minutes starts now.
No signup. No install. Just click Start.