radialtimers.com
This timer draws 24 hours as 20 concentric rings; one empties every 72 minutes, so a glance shows how far along you are without reading a digit. It chimes at zero, keeps counting in a background tab, runs fullscreen, and exports as a free MP4 video. Handy for a day-long countdown, a 24-hour hackathon, or a jar of refrigerator pickles.
A full day is the longest length the site gives its own page, and the slowest dial. Each ring lasts an hour and twelve minutes, so the face changes about as often as the light outside does; five rings is six hours, ring ten is noon to midnight, and the last ring is the final hour and a bit. Set it, leave the tab open, and the countdown follows the clock until the chime a day later.
Twenty-four-hour hackathons are the classic format: teams start together, build through the night, and demo when the clock runs out. A dial fullscreen on a wall shows every team the same truth. Plan by rings: a working prototype by ring ten, features frozen by ring sixteen, the last four rings for the demo and the slides.
Sliced cucumbers, onions, or carrots in a hot vinegar brine are ready to eat after about twenty-four hours in the fridge, crisp and sharp, and keep improving for a few days after. Start the dial as the jar goes in, and the chime tomorrow is the first taste. No canning, no sealing, and no waiting a month.
Some things are simply a day away: a flight, a result, a launch, the end of a fast. A dial set to twenty-four hours turns that into a shape you can glance at instead of a time you keep calculating. If the wait is longer than a day, the site's days until Christmas and New Year countdown pages count in days, and any dial takes a custom length beyond this page.
Twelve-hour halves switch at ring ten; six-hour quarters at every fifth ring; three-hour eighths every two and a half rings. The 12 hour dial covers the overnight half on its own. The full range of shorter lengths is on the timers page.
72 minutes. The dial always has 20 rings, and this timer runs 24 hours.
Yes. The nearest page is the 12 hour timer, and the custom field on any dial takes an exact length.
Add it as a browser source in OBS; the background stays transparent. Change t for any length.
A radial timer is a free online countdown timer you set in one click: pick a length, press Start, and an alarm sounds at zero. Run several timers at once, take one fullscreen, or pop one out picture-in-picture to float over other apps. Every timer keeps counting in a background tab, and any timer exports as a video. No download, no sign-up.
Its dial draws the countdown as 20 concentric rings, one for each twentieth of the duration. Rings empty one by one, outermost first, so a glance shows how far along you are without reading a digit.
Yes. The countdown follows the clock, so it stays on time while you work in another tab and still chimes at zero. The picture-in-picture popout keeps a small dial in view the whole way.
Yes. Any timer exports as an MP4 or a transparent WebM of the whole countdown, up to 4K and 60 fps, in 16:9, vertical, or square.
Yes. In OBS, add a browser source pointing at radialtimers.com/overlay?t=25m and a transparent dial counts down over your scene. Change t for any length, like 90s or 3h.
As many as you need. Each timer gets its own dial and runs on its own, which suits interval workouts, several dishes on the stove, or a room of activity stations.