Half an hour, visible in the browser
Phone timers hide in the notification tray. A 30-minute face on a monitor is easier for a room to see. If your block is a full hour, use the 60 minute timer instead.
30:00
30:00
Up next
While running, tap a preset to queue up to 3 timers.
Presets
One tap: skin, backdrop, and motion.
Ready
00:30
Ember focus
D · display mode
Time’s up!
Photo gallery
Tap a photo to set the stage backdrop. Instant looks still control skin and motion.
Timer settings
Set a custom duration and title, then fine-tune look and alarm if you need to.
Timer setup
Appearance
Looks on the stage already set the scene. Here: digit style, photo gallery / custom photo, and display blur.
Digit style
Custom photo
Sound
Volume
Saved setups
Favorites
No favorites yet. Set up a timer you like, then tap "Save current".
History
No completed timers yet. Finish a countdown to see it here.
More timers
More durations or a short countdown to a date — pick a pane.
Durations
Seconds
Hours
Countdown
Custom date & time
Day of week
Time of day
Date & holiday countdowns
Live days–hours–minutes–seconds to any date or holiday.
Learn more
Thirty-minute countdown
A half-hour on the clock
This page sets 30:00 for you. Start it for a class segment, a workout, a cooking stage, or a meeting that should not drift. The same online timer engine powers alerts, sleep mode, and share links.
Thirty minutes is a natural calendar slot: one episode of deep work, one lab station, one oven window. Leave the tab open; the countdown does not depend on the page staying in the foreground.
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01
Start at 30:00
Press Start for thirty minutes. Add a minute if a lecture ran over, or queue 5 minutes for questions at the end.
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02
Start the countdown
Press Start or Space. Progress updates on a circular dial, and the face shows when the timer ends. Pause anytime, add +1 min, queue another timer, or go fullscreen / sleep for a distraction-free display. The tab title shows remaining time while you work elsewhere.
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03
Hear the alert & keep going
When time is up, stop the alarm with one tap. Start the next queued timer, review local history, export CSV, or copy a shareable link. A refresh restores an in-progress countdown on this device.
What you get
- Presets & quick lengths Jump to common seconds, minutes, and hours, or named timers like study and classroom. The Countdown pane still offers weekdays, times of day, and a custom datetime — holiday countdowns are on the Online Countdown tool.
- Background-tab accuracy Countdown uses deadline math so it stays correct when the browser throttles hidden tabs.
- Sounds, notifications & wake lock Choose alert sounds and ring length, get a desktop notification when finished, and keep the screen awake while running.
- Fullscreen & sleep mode Go fullscreen for a large dial display, or sleep to dim the whole page so only the countdown stays visible.
- Up-next queue While a timer is running, tap presets to queue up to three countdowns and start the next when you are ready.
- Embed widget Drop a compact countdown on your site with custom colors, size, skin, and default duration.
Frequently asked questions
Setting the dial, presets, alerts, and embeds — quick answers.
Can I put a 30 minute timer on a second screen?
Yes. Fullscreen or display mode fills the monitor. Sleep mode hides other chrome so the room only sees the remaining time.
Is the 30 minute timer accurate if I lock the computer?
The end time is a timestamp, so sleep can delay the alarm until the machine wakes. For a classroom clock, keep the display awake with wake lock while it runs.
Can I name this 30-minute run?
Yes. Set a title in timer settings so the alarm and history show “Lab A” or “Oven” instead of a blank 30:00.
How do I start a 30 minute timer every day?
Bookmark this URL. Each visit loads 30:00 again. There is no account or cloud schedule — it is a page you open when you need the half hour.