Alarm options
Space start / pause · R reset · F fullscreen
A 1 hour timer, ready to start
This timer is already set to 1 hour. Press Start — or the Space bar — and it counts down, then plays an alarm when the time is up. No setting up, no sign-up, nothing to install.
Leave it in a tab while you work: the time left shows in the browser tab, so you can see it from any other tab. Or press Fullscreen to fill the screen with big numbers and a progress bar — handy in a classroom, a kitchen or a meeting room.
What people use a 1 hour timer for
- An exam or mock test
- An hour of study or practice
- A workout or long walk
- Roasting chicken or slow cooking
- A parking or meeting time limit
- A game time limit for kids
An hour feels long, which is why it helps to see a progress bar — and the time left in the browser tab, even while you use other tabs.
Features
- Ready at 1 hour — or click another preset, or type any time
- Four alarm sounds — beep, bell, digital watch or a gentle chime — that keep ringing until you press Stop
- Ends at — see the clock time when the timer will finish, and add +1 min while it runs
- The time left in the browser tab, which blinks "Time's up!" at the end — plus an optional notification
- Fullscreen with big digits and a progress bar
- Keeps the screen on while it runs, so a phone or laptop does not go dark
- Pause and resume without losing the time left
- Keyboard shortcuts: Space start / pause, R reset, F fullscreen
- A stopwatch too, one tab away
How to use it
- Press Start (or the Space bar) — the 1 hour countdown begins
- Press Pause to stop for a moment and Resume to go on
- Press Fullscreen to show the timer big on your screen
- When the alarm rings, press Reset to start again
Frequently asked questions
Does the timer keep running in another tab?
Yes. You can switch tabs or minimize the window; the timer keeps counting and the alarm rings on time. Just do not close this tab.
Will the alarm ring if my computer goes to sleep?
No — a sleeping computer runs nothing. That is why the timer asks the browser to keep the screen on while it counts down.
Can I set more than one hour?
Yes. Type any hours, minutes and seconds into the boxes, or use the Timer — up to 99 hours.
Can I change the alarm sound?
Yes. Open Alarm options and pick a beep, a bell, a digital watch or a gentle chime — you hear it when you choose it. You can also let it ring just once, or keep ringing until you press Stop.
Is it free?
Yes. No sign-up and nothing to install, and it works offline once the page is open.
Related tools
- Timer & Stopwatch — set any time
- Pomodoro Timer — work and break cycles
- Online Clock — a big full-screen clock
