It is 2:41. You have been heads-down on the same document since a little before two, and the useful part of your attention is gone. That is the moment this page exists for: press start, get away from the desk, and let 17:00 run down without you watching it. The same countdown covers a HIIT circuit, a nap that ends before deep sleep, or a covered pot of rice on low heat. Everything runs in your browser — nothing to install, no account, no server-side memory of the session. At zero, the alarm repeats until you stop it — and for a full minute if you are not there to.
What a 17 Minute Timer Is Good For
The 52/17 break
DeskTime, a time-tracking company, looked at its own usage data in 2014 and found the most productive 10% of its users worked about 52 minutes and then stopped for about 17. It is an observation pulled from app logs, not a controlled trial, but the shape is useful: the break has to be long enough that you actually leave the chair. Start this page when you stand up and let it decide when you sit back down.
A HIIT circuit that closes at 17:00
Two minutes of easy movement, twelve rounds of 40 seconds hard and 20 seconds easy, then three minutes of walking and stretching — the arithmetic closes exactly on 17:00. This page counts the whole session rather than the individual rounds, so you read your intervals off the falling digits. Prop the phone against something at eye level; the wake lock keeps the screen lit through every round.
A nap that ends before the deep stuff
Sleep researchers who compared 5, 10, 20 and 30-minute afternoon naps found the 10-minute nap paid off immediately, while the 30-minute nap delivered grogginess before any benefit — the price of dropping into slow-wave sleep. A 17-minute window respects that: subtract the few minutes it takes to drift off and the actual sleep sits around ten. Pick the alarm tone you find least startling and lie down as the count starts.
Rehearsing a talk against the real ceiling
TED caps its main-stage talks at 18 minutes, and conference organizers who copy the format usually copy the number. Rehearse at 17 and you build in the slack a live room always takes back — a laugh you have to wait out, a slide that hangs, a question you decide to answer. Run the countdown face-down beside you, speak the whole thing aloud without stopping, and see where the alarm catches you.
Rice, covered, on the lowest heat
Most long-grain white rice wants 15 to 18 minutes of covered simmering once it comes to a boil, and the one thing that ruins it is lifting the lid to check. Seventeen sits inside that window, at the patient end of it. Start the count when you turn the heat down, leave the pan alone, and when the alarm goes, pull it off the burner and let it rest another ten before the fork goes in.
The nightly reading log
Plenty of elementary schools ask for 15 to 20 minutes of independent reading a night, and the log has to be signed. Seventeen minutes ends the argument about whether it counts: the timer decides, not the parent. Put the phone on the shelf with the digits facing the bed, out of reach. When the alarm sounds, the bookmark goes in wherever the page happens to be.
The agenda item that always overruns
Every recurring meeting has one topic that eats the hour. Give it 17 minutes on the shared screen instead — long enough for a real discussion, short enough that people get to the point, and odd enough that nobody rounds it up to about half an hour. Screen-share the fullscreen digits so the whole call watches the same clock, and park whatever is unresolved at zero rather than letting it run.
How This Timer Works
There is nothing to set. The clock is fixed at 17:00 — 1,020 seconds — so start is the only control you have to touch; pause, reset, fullscreen and a button that plays your alarm tone at real volume sit around it for when you want them. The count is anchored to your device's wall clock rather than tallied tick by tick, so switching tabs, locking the phone, or loading a heavy page cannot make it drift; zero arrives when zero was always going to arrive. Remaining time mirrors into the tab title. Fullscreen scales the digits for a room, and a wake lock holds the screen on. At zero the alarm repeats rather than chiming once, stopping when you dismiss it or after 60 seconds if nobody does.
Keyboard shortcuts: Space starts or pauses, R resets, F toggles fullscreen. The countdown is anchored to your device's clock, so it stays accurate even if the browser throttles the tab in the background.
Frequently Asked Questions
Does the timer keep counting if I lock my phone or switch tabs?
Yes. While the timer runs the page requests a screen wake lock, which keeps the display from dimming and locking on its own. A wake lock cannot stop a tab switch or a deliberate lock, and it drops if the page goes to the background — but the count survives either way, because the finish time is fixed against your device clock the moment you press start. Browsers throttle background timers; they cannot move a wall-clock deadline.
How loud is the alarm, and how long does it ring?
It plays at whatever your device volume is set to — the page cannot exceed it, so set it before you start, and use the test button to hear your chosen tone at real volume first. From zero the alarm repeats rather than chiming once, which is what makes it usable from another room. If nobody dismisses it, it stops itself after 60 seconds, so an abandoned tab is not still ringing an hour later.
Where does the 52/17 rule come from?
From DeskTime, a time-tracking app, which in 2014 pulled the habits of its most productive 10% of users out of its own logs: roughly 52 minutes of work followed by roughly 17 minutes away. It is a pattern found in usage data, not a result from an attention lab, and the exact numbers are not magic. What holds up is the principle — the break is a real break, not a scroll at the same desk.
Is 17 minutes a good length for a nap?
It sits on the safe side of the usual advice, which is to stay under about 20 minutes so you wake out of light sleep rather than slow-wave sleep. A 2006 study comparing 5, 10, 20 and 30-minute naps found the 10-minute nap lifted alertness right away and held it for more than two hours, while the 30-minute nap brought grogginess before any benefit. Counting the minutes it takes to fall asleep, a 17-minute window usually buys around ten of real sleep. Individual sleep varies.
Can I change the duration or add intervals?
No — the timer is fixed at 17:00, and that is deliberate. Every field removed is a field you cannot mistype at the moment you actually want to start counting. It is a single countdown rather than an interval trainer, so it will not beep between HIIT rounds; for those, read the rounds off the running digits. If 17 is the wrong number, use a timer built for the length you actually want.
What if I get interrupted partway through?
Pause freezes the remaining seconds, and resume picks up at the identical second — the finish time simply shifts forward by however long you were stopped. Reset drops the display back to 17:00 for the next block. Both controls stay on screen in fullscreen mode. If you close the tab, the countdown goes with it: nothing about the session is sent anywhere, and a reopened page starts fresh at 17:00.