Timecade

Classroom Timer

AboutOpen in app →
05:00
Set your own time
:
Quick presets

A big, visual timer built for the classroom

Free, no signup. Set your own time or pick a preset, choose a display style, and go fullscreen so every student in the room can read the countdown.

Embed this timer on your own page

Paste one line of HTML into your class website, LMS (Google Classroom, Canvas, Teams), Notion page or blog. The embedded timer runs on its own — no signup, no cookie banner, no ads.

Start from a preset

Preview
Embed code

Direct link: https://timecade.com/embed/timer?minutes=5&style=digits

Control the timer from your page (advanced)

Send commands to the iframe with postMessage:

const frame = document.querySelector('iframe').contentWindow;
frame.postMessage({ type: 'start' }, '*');   // start | pause | reset
frame.postMessage({ type: 'set', seconds: 600 }, '*');
frame.postMessage({ type: 'getState' }, '*'); // replies with type: 'state'

The timer posts back to the host page:

window.addEventListener('message', (e) => {
  if (e.data?.source !== 'timecade-timer') return;
  const {
    type,            // ready | started | paused | reset | tick |
                     // warning | finished | state | set | fullscreen
    state,           // running | paused | finished
    remaining,       // ms left
    remainingSeconds,
    elapsed,         // ms elapsed
    duration, durationSeconds,
    running, finished, title, at,
  } = e.data;

  if (type === 'finished') console.log('Time is up!');
});

ready fires once the embed is loaded, tick every second while running, and warning at 10 seconds left.

Features
  • Distraction-free display — huge digits, high contrast, readable from the back of the room.
  • Fullscreen ready — one click sends the timer edge-to-edge on any projector or smartboard.
  • Quick presets & custom time — 1, 5, 10, 15, 30 min one-tap, or set your own.
  • Three visual styles — digits, ring, or bar stack. Pick what works best for the class.
  • Embeddable — drop the timer straight into your class website, LMS or Notion page with one iframe.
Ways teachers use it
  • Timed writing prompts and quizzes with a visible countdown.
  • Silent reading blocks and independent work sessions.
  • Group rotations, station work and think-pair-share intervals.
  • Brain breaks, transitions and lining-up warnings.
  • Presentations with equal speaking time for every student.

Need more than a timer?

Timecade also has stopwatch, alarm, pomodoro, tabata and world clock modes.

Open in app →