TimerHub
TimerHub

Each opens with its own scene, sound and sensible defaults.

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7 Second Timer

Seven seconds, start to beep: a round of the 7 Second Challenge, the hold in 4-7-8 breathing, or a quick-fire answer.

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How to use the 7 second timer

  1. Press StartThe 7 second countdown begins at once. The Space bar starts and pauses it too; R resets it.
  2. Adjust as you goUse − and + to change it by 10 seconds, or click the digits and type any time, like 12:30, 1h30 or until 5:30pm.
  3. Hear the alarmA loud bell and beep rings at zero until you press Stop, with a vibration on phones. Pick a chime, a shorter ring or a silent glow under More.
  4. Make it yoursPick a scene and sound, press Fullscreen for a room-sized Clear view (Esc to exit), turn on notifications for a background tab, or add ?autostart=1 to the link to start on load.

Shortcuts

SpaceStart / pauseRReset+Add time (− removes it)FFullscreen

Single-key shortcuts can be switched off under More.

7 second timer at a glance

AccuracyCounts to an absolute finish time, so it stays exact in a background tab and after the device sleeps. How the timing is tested
AlarmLoud bell & beep that rings until you press Stop, with the whole screen flooding sunrise-warm. Chime, bell, beep, a shorter ring or a silent glow under More.
DisplayLarge digits that never jitter, a progress horizon, and a fullscreen Clear view (or Daylight, for bright rooms) readable across a room.
SoundOptional rain, ocean, fireplace, café, night, brown or white noise and a focus pad — made in your browser, faded out at zero.
MemoryA running or paused countdown survives a reload or a browser restart, saved on this device only.
PriceFree. No ads, no signup, nothing to install — and it works offline once visited.

7 Second Challenge ideas

ChallengeKind
Name five fruitsWarm-up
Say the alphabet backwards from MBrain twister
Do ten jumping jacksOn the move
Name three countries that start with SGeography
Spell your full name backwardsBrain twister
Touch something red, something soft and your noseScavenger hunt

Other ways to time 7 seconds

The same countdown as a picture, a soundscape, a projector view or a video.

Sand timerVisual timer · set it to 7 secondsCandle timerVisual timer · set it to 7 secondsRocket timerVisual timer · set it to 7 secondsTimer with musicRain, sea or fire under the countdownClassroom timerProjector view · gentle chimeTimer video (MP4)For Slides, Canva & Keynote

About the 7 second timer

The 7 Second Challenge is simple: someone reads out a task — name five fruits, do ten jumping jacks, spell your name backwards — and you have seven seconds to finish before the beep. Seven is also the hold in 4-7-8 breathing, and the delay a live broadcast classically keeps in hand. Press Start or Space and the countdown begins at once.

A 7 second timer for the 7 Second Challenge, the 7-second hold in 4-7-8 breathing and quick-fire quiz rounds. Big digits, a beep at zero, no ads.

TimerHub calculates remaining time from an absolute finish timestamp, so missed browser callbacks do not create drift. Read the timing accuracy methodology and reproducible tests.

7s timer7 sec timerseven second timer7 second challenge timer

7 second timer FAQ

How do you play the 7 Second Challenge?
One person reads out a challenge and presses Start; the player has seven seconds to finish before the beep. Take turns, keep score, and press R then Space for the next round. On a TV or projector, Fullscreen makes the digits big enough for the whole room.
What is 4-7-8 breathing?
A relaxation pattern: breathe in through your nose for four seconds, hold for seven, then breathe out through your mouth for eight. Use this timer for the hold and the 4 second timer for the in-breath, or let the Meditation timer run a whole session.
What is the seven-second delay?
Live radio and TV often run a few seconds behind real time so a producer can cut anything that shouldn't go out; the seven-second delay became the name for it. It's a handy length to feel when you set the delay on your own stream.
Can a whole room see the countdown?
Yes. Press Fullscreen, or F, for the Clear view: huge digits on a dark screen the back row can read, with a Daylight version for bright rooms.
Is it exactly seven seconds?
Yes. It counts to an absolute end time rather than adding up ticks, so a busy device can't stretch it, and the beep comes the moment it reaches zero.

Build repeating work and rest rounds in the Interval Timer →

Take this timer with you

Keep it beside your notes in Notion, embed it on a class page or website, put it on stream, or drop an MP4 into your slides. Free, no account, no ads.

Use this timer in your workspace →