Free Countdown Timer for Classroom & Smartboard
The simplest countdown timer for teachers, students and classrooms. Big digits readable from the back of the room, works on Chromebook with no signup, runs offline after the first load. Project it on your smartboard or interactive display.
Why Teachers Love FullScreenCountdown
Zero friction for students
No signup, no account, no app download. Students open the URL in their Chromebook browser and they have a timer. School IT departments love this.
Readable from the back row
Press F to fullscreen. The digits automatically scale to fill the largest possible space on a smartboard, projector, or interactive display. No more "I can't see it!"
Offline-first by design
After the first visit, the timer is cached by the browser and works without internet. Perfect for schools with restricted networks or unreliable Wi-Fi.
Quick presets for common activities
Pick from 1, 5, 10, 15, 25, 30, 45 minutes or 2 hours. Perfect for timed activities, group rotations, Pomodoro study sessions, and exam conditions.
Audible alert
An audible bell rings when the timer hits zero. Students hear it across the room without you having to say "Time's up!"
Pomodoro mode
Set 25 minutes for work, enable Auto-Repeat and students see the timer restart automatically for each Pomodoro sprint. Built-in study technique support.
Common Classroom Uses
Timed group work
Set 5–15 minutes. Project on the board. Students self-pace and rotate when the bell rings.
Exam conditions
Set the full exam length, project on the board, students self-monitor their own pace.
Pomodoro study sessions
25 minutes work, 5 minutes break, repeat. Use auto-repeat for continuous Pomodoro cycles.
Bell-ringer / warm-up
5-minute countdown at the start of class to get students focused and on-task.
Quiet reading time
Set 15–20 minutes for sustained silent reading. The visual countdown helps students self-regulate.
Quiz / exit ticket
5–10 minutes for an exit ticket or quick formative assessment.
FullScreenCountdown vs Other Classroom Timers
| Feature | FullScreenCountdown | Online Stopwatch | Phone App |
|---|---|---|---|
| No signup | Yes | Yes | Usually |
| Works on Chromebook | Yes | Yes | No |
| Works offline | Yes (PWA) | No | Yes |
| Smartboard / projector ready | Yes | Partial | No |
| Shareable URL | Yes | No | No |
| Audible alert | Yes | Yes | Yes |
| Quick presets | Yes | No | Sometimes |
| Pomodoro auto-repeat | Yes | No | Sometimes |
| Privacy (no tracking) | 100% local | Varies | Yes |
Frequently Asked Questions — Classroom Timer
Does the countdown timer work on a school Chromebook?
Yes. FullScreenCountdown runs in any modern browser including Chrome on Chromebook. No extension, no install, no admin permissions required.
Do students need to sign up?
No. The timer is free and requires no signup, no account, no email. Open the URL and start.
Can I project the timer on a smartboard?
Yes. Press F to make the timer fullscreen. The digits automatically scale to fill the smartboard, projector, or interactive display. Readable from the back of any classroom.
Can students share timers with each other?
Yes. Every setting is encoded in the URL. A student can copy the page address and share with classmates for group work timers.
Is the timer good for test-taking and exam conditions?
Yes. Set the exam duration, project it on the board, and let students self-pace. The audible alert signals when time is up.
Does it work offline at school?
Yes. After the first visit, the timer is cached by the browser and works without internet. Schools with restricted networks can use it after the initial load.
Open the classroom timer now
No signup, no install, no email. Free for teachers and students, forever.
Open 10-Minute Class Timer