Online Countdown Timer — Big Screen, Sound Alert, Free
Who this is for: For anyone who needs a countdown running in the next ten seconds — a meeting warm-up, a game night turn, a kitchen timer, a sale that ends at midnight — without installing an app or making an account.
Not the right tool for: Counting down to a calendar date — that's the date countdown, which takes a date instead of a duration · Alarms that fire while this tab is closed — a web page can't notify you after it's closed; an installed app can
Set hours, minutes, and seconds, press start, and get a big full-screen countdown with an alert at zero. Free, no signup, no ads in the timer itself.
Quick answer: An online countdown timer counts down from any duration you set and alerts you at zero. Set hours, minutes, and seconds below, press Start, and the timer runs full-screen with a red final-ten-seconds warning and a sound alert — free, no signup.
| Range | 3 seconds – 999 hours |
|---|---|
| Display | Full-screen big numbers, red final 10 s |
| Alert | Sound beep at zero (browser-generated) |
| Account | None — free, no signup |
What does this online countdown timer do?
It counts down any duration you set, from 3 seconds to 999 hours, with numbers big enough to read across a room. Press start and the timer anchors on your device clock, so it stays exact even in a background tab; the last ten seconds turn red so nobody has to squint, and a beep sounds at zero. Pause, resume, and reset are one tap each, and the fullscreen mode turns any laptop, tablet, or TV browser into a dedicated countdown display.
Common uses
- Timing meeting segments, exams, and presentations without a phone app
- Running game nights, quizzes, and party challenges
- Kitchen and workout timing with numbers visible from across the room
- A sale or launch countdown you screen-share in a live stream