Full-Screen Countdown Timer

A big, full-screen countdown timer with four skins and an alarm — set any time and start in one click.

Skin

Set time (mm : ss)

Quick presets (minutes)

05:00

Alarm sound

Shortcuts: Space start/pause · R reset · F full screen. Press Esc to exit full screen.

05:00

How to use the Full-Screen Countdown Timer

Set the time. Type minutes and seconds or tap a quick preset like 5, 10 or 25 minutes.
Pick a skin. Choose how the timer looks from the skin menu.
Start full screen. Hit Go full screen, then Start — the countdown fills your display until it hits zero.

Why use our Full-Screen Countdown Timer

Truly full screen. Fills the whole display so it's readable across a classroom, kitchen or meeting room.

Four skins. Switch between Minimal Digital, Flip Clock, Neon Glow and a depleting Progress Ring.

Alarm when done. A clear beep and a screen flash tell you the moment time runs out.

Keyboard friendly. Space starts and pauses, R resets, F goes full screen — no mouse needed.

Free to use — premium coming soon

FREE

✓ Any duration + presets
✓ Four full-screen skins
✓ Alarm sound & flash
✓ Keyboard shortcuts

PREMIUM

★ Remove ads
★ Custom colours & fonts
★ Saved timer presets
★ Multiple sequential timers

About the Full-Screen Countdown Timer

A countdown timer is one of those tools you reach for constantly — timing a workout, a presentation, a cooking step, an exam or a classroom activity. What makes one genuinely useful is that you can read it from across the room and trust it to alert you. This full-screen countdown timer does exactly that.

Set any duration or tap a preset, choose the look that suits the moment, and go full screen. When the timer reaches zero it beeps and flashes so you never miss the end. Because it runs entirely in your browser, it's fast, private and works without an internet connection once the page has loaded.

Frequently asked questions

Does the alarm need sound files?

No. The beep is synthesised in your browser with the Web Audio API, so nothing is downloaded and it works offline.

Will it keep running in a background tab?

It's most accurate while visible. The timer is timestamp-based, so when you return to the tab it shows the correct remaining time.

Can I use it on a projector or TV?

Yes — that's what full-screen mode and the large skins are designed for.

Is it free?

Completely. Unlimited use, no signup, and everything runs in your browser.

From our blog

A quick guide to the Full-Screen Stopwatch

By the Super Simple Digital Tools Team · Updated June 2026

Whether it's for work, study or everyday life, the Full-Screen Stopwatch takes the hassle out of online utilities. A precise full-screen stopwatch with lap times and four skins — start timing in one click.

Using it takes seconds: choose how the stopwatch looks, then go full screen if you want it large, then press Start (or Space) to begin and Lap (or L) to mark split times, then press Reset (or R) to clear the time and laps and start again.

Hundredth-second precision — Counts up with centiseconds using a drift-free, timestamp-based engine.

Ready to try it? Open the Full-Screen Stopwatch and get your answer in seconds.

Hundredth-second precision: Counts up with centiseconds using a drift-free, timestamp-based engine.
Lap times: Record and review laps with a single button or the L key.
Four skins: Minimal Digital, Flip Clock, Neon Glow or a sweeping Progress Ring.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.