25 Minute Timer
A ready-to-start 25-minute countdown. Press Start — the alarm sounds when time is up.
Pre-set to 25 minutes — one Pomodoro work interval. Need a different length? Use the online timer or pick another preset below.
About this tool
This page is a 25-minute timer with nothing to configure: the duration is already set, so starting takes one click. Twenty-five minutes is one Pomodoro: work for 25, break for 5, and take a longer break after four rounds. The length was chosen to be short enough to start without resistance and long enough to finish something real — most people find their first honest hour of focus comes in these blocks.
Like every DetZero tool it runs entirely in your browser: nothing to install, no account, and the time left is mirrored in the tab title while you work elsewhere. At zero the alarm sounds and the status line announces it; Pause holds the countdown exactly where it is, and Reset restores the full duration.
How to use it
- Press Start — the timer is already set to 25 minutes.
- Work the Pomodoro — the tab title shows the time left.
- The alarm sounds at zero. Press Reset to run it again.
Frequently asked questions
How do I set a 25 minute timer?
You don't need to set anything — this page is pre-set to 25 minutes. Just press Start.
Will the alarm work if I switch to another tab?
Yes, the countdown continues and shows in the tab title; the sound plays as long as this tab stays open somewhere in your browser.
Can I use this as a 25 minute timer with alarm for a Pomodoro work session, focused study or deep work?
Yes — it is a plain countdown with an audible alarm at zero, which works well for a Pomodoro work session, focused study or deep work, and for anything else that takes 25 minutes.