Seven minutes is an odd length on purpose: too long for a sip of water, too short for a meeting. A jammy egg sits near here if the water was already boiling and the egg was cold from the fridge.
Use it when a round number would invite people to stretch the task. Seven minutes ends, and that is the point. Press space to start or pause, R to reset, and F for fullscreen. The screen can stay awake after you start, using the wake lock your browser allows. Pick the alarm before you begin. A bell, a chime, a beep, or a short digital pulse all come from the Web Audio API, so there is no sound file to wait on.
This page is the 7 minutes countdown and nothing else is running underneath it. Related lengths are linked under the guide if you want a neighbor, and the timer itself stays above the fold.
Questions
How do I run a 7 minutes timer on a projector?
Press start, then F or the fullscreen button. Classroom mode hides the writing so the digits fill the wall. Use it when a round number would invite people to stretch the task. Seven minutes ends, and that is the point.
What is 7 minutes actually good for?
Seven minutes is an odd length on purpose: too long for a sip of water, too short for a meeting.
Will the countdown drift if I switch tabs?
No. The end is a timestamp. The display is the gap between that timestamp and now, so a background tab does not lose seconds the way a ticking counter would.