Set hours, minutes and seconds, press Start. It rings at zero and stays right in a background tab.
Ten minutes is 600 seconds. This page opens with the countdown set to 10:00 and the 10 min quick time selected, so the first press of Start begins a ten minute run. It fits tasks long enough to need a clock and short enough to finish in one sitting: a warm-up, a stretch, a quick tidy of one room, a lab step, or a ten minute break. The count shows minutes and seconds, from 10:00 down to 00:00, then Time's up with three short beeps unless you mute it. You can pause when someone interrupts and resume without losing the time left. Because the time comes from your device clock rather than from counting, a laptop that sleeps for part of the ten minutes still shows the true time left when it wakes, or Time's up if the ten minutes passed. It will not ring while it sleeps, though. If you need ten minutes of work then a rest on a loop, the interval timer does that.
Type hours, minutes and seconds into the three boxes, or tap one of the quick times: 1, 3, 5, 10, 15 or 30 minutes. A quick time fills the boxes, and it shows as chosen whenever the boxes add up to exactly that. On a phone the quick times, the clock and Start come first, and the three boxes sit under Custom time and sound. Hours go up to 99. Minutes and seconds go up to 999 each, so 90 minutes or 150 seconds can be typed as they are. A box left empty counts as 0. The whole time cannot be more than 99 hours and must be above zero, or the page shows a short message and Start stays off. Once the timer starts, the boxes and quick times are locked until you press Reset, so a stray tap cannot change a timer that is running. The display uses minutes and seconds, and switches to hours, minutes and seconds when the time you set is an hour or more.
The timer does not count ticks. On Start it notes the time on your device clock, and each redraw works out how much of your time has gone. Pause stores what has gone so far, and Resume carries on from there. So a timer in a background tab, or one on a laptop that slept, still shows the right time left when you look again. If the time ran out meanwhile, it shows Time's up. The display rounds up, so it reads 00:01 until the last second is over and only shows 00:00 at zero. The timer relies on the device clock: if that clock is changed by hand while the timer runs, the reading follows it. The tab title does not change as it counts down, so you cannot read the time from another tab.
When the time is up the page plays three short rising beeps, unless you turn off Play a sound at zero, and shows Time's up with a Start again button. Browsers only allow sound after you have used the page, so the sound is prepared when you press Start. A background tab may delay or block sound, and a phone that locks its screen may stop the page altogether, so for something that must not be missed, also set an alarm on the device. With Repeat when it reaches zero on, the timer starts over by itself each time it reaches zero and beeps each time. The status line says how many times it has finished. If a sleeping tab missed several rounds, you hear one beep when it wakes.
The hours, minutes and seconds boxes, the Repeat choice and the sound choice are remembered in this browser, so the page opens with your last time. The running countdown is not saved: reloading or closing the tab ends it, and the timer opens stopped. Nothing you type is sent anywhere. Page visits are counted with Google Analytics, never the times you set. Where the browser supports it, the screen is kept on while the timer runs and released when you pause, reset or leave. The timer works without a connection once the page has loaded.
Yes for the time shown. The timer reads the device clock when you come back, so if 4 of the 10 minutes passed while the lid was closed, it shows 06:00 left, or Time's up if all ten went. It cannot make a sound while the computer sleeps.
Use the interval timer: set Work to 600 seconds, Rest to 300 seconds and pick the number of rounds. It shows the phase name, beeps at each change and counts down the whole session.
Yes. Pause keeps the time left, for example 07:12, for as long as you leave it. Press Resume to carry on from there. Reset throws the count away and returns to 10:00.
The time stays right, because it is worked out from the clock, and Time's up is shown the moment you return. The sound is the weak point: browsers can delay or block sound in a background tab. For a 30 minute timer that must ring, keep the tab visible or add a phone alarm.
Yes, up to 99 hours in total. Type 2 in Hours and 30 in Minutes for 2 hours 30 minutes, or 150 in Minutes. The display then shows hours, minutes and seconds.
The countdown stops and the page opens at your last typed time, ready to start again. Only the boxes and your Repeat and sound choices are stored, never a running timer.
Yes. Turn on Repeat when it reaches zero. At zero it starts the same time again and beeps, and the status line counts the rounds finished. Press Pause or Reset to stop it.
The boxes are locked after Start so a stray tap cannot move the finish line. Press Reset, change the time and press Start again. Pause keeps the time left, so you can pause as long as you like.