Screen Soft Light / Timekeeping / ONLINE TIMER

05:00

Space starts or pauses, R resets, F goes fullscreen.

No. 001 · ONLINE TIMER

Online timer — set any countdown and go fullscreen

  • 01 Any time up to 24 hours
  • 02 Alarm when time is up
  • 03 Fullscreen, readable from afar

Set minutes and seconds, press Start, and the countdown runs in large digits you can read from across a room. It keeps the screen awake while it runs, plays an alarm when time is up, and works in any browser without an app or sign-up.

Other timers —
1 min2 min3 min5 min10 min15 min20 min30 min1 hourClassroomAlarm clockSunrise alarmOK-to-wake
§ 01

A countdown you can read from across the room

Phone and watch timers are built for the person holding the device. This one is built for a screen everyone can see: the digits scale with the window, fullscreen removes the browser around them, and the progress bar along the top shows how much of the time is gone at a glance. Put it on a laptop at the front of a meeting, a tablet on a kitchen counter or a TV connected to a computer.

§ 02

Browsers slow down timers in tabs you are not looking at, which is why some web countdowns drift.

Built to finish on time

Browsers slow down timers in tabs you are not looking at, which is why some web countdowns drift. This timer stores the moment the countdown should end and checks the real clock against it, so a five-minute timer ends five minutes after you press Start even if you switched to another tab in between.

§ 03

No app, no account, nothing saved

The timer runs entirely in your browser. There is nothing to install and no sign-in, and the alarm is generated by the browser's audio engine rather than downloaded, so it works the moment the page loads.

Procedure

Three moves to peak output

  1. 01

    Set the time

    Type minutes and seconds and press Set, or pick a preset duration from the list above the timer.

  2. 02

    Start and go fullscreen

    Press Start (or the space bar), then Fullscreen (or F) so the digits fill the display.

  3. 03

    Adjust without restarting

    Use +1 min or −1 min while it runs to stretch or shorten the countdown on the fly.

Inquiries

Questions worth asking

Q.01 How long can I set the timer for?
Anything from one second up to 24 hours. Enter minutes (up to 1,440) and seconds, then press Set.
Q.02 Can I use the keyboard?
Yes. Space starts or pauses, R resets to the set time and F toggles fullscreen.
Q.03 Why does the screen change color?
The timer is a light as well as a clock. It starts as cool 6500K daylight and warms through the color temperatures of a sunset — 4000K, 3000K, 2200K — to an ember red at zero, so you can tell roughly how much time is left from across a room without reading the digits. Turn off Color light for a plain dark timer.
Q.04 Does the timer keep running if I switch tabs?
Yes. The countdown is calculated from the clock rather than counted tick by tick, so it finishes on time even when the browser slows down a background tab. The alarm plays when it ends, as long as the tab is still open and the sound toggle is on.
Q.05 Will my screen turn off while the timer runs?
On browsers that support the Screen Wake Lock API (Chrome, Edge and recent Safari), the timer asks the device to keep the screen on while it runs, and releases that request when you pause or the countdown ends.
Cross-reference

Try adjacent plates