radialtimers.com
This timer draws 30 minutes as 20 concentric rings; one empties every 1.5 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 workout block, capping a meeting, or a half hour of instrument practice.
Parkinson's law says work expands to fill the time available, and a half hour is a good way to call its bluff. Email, tidying, or planning a trip will each swallow an evening if you let them; handed thirty minutes, the same job usually fits. It helps that thirty minutes still feels generous, so the deadline reads as fair and you stay inside it.
Thirty minutes is the length of a meeting slot, a sitcom, a workout block, and a serious practice session. It is generous enough to feel fair and short enough to see the end of. Each ring on the dial lasts a minute and a half; ring ten is the fifteen-minute mark, and every fourth ring is six minutes.
Thirty minutes covers a warm-up, a main set, and a cool-down for most home workouts: five minutes to loosen up, twenty of work, five to stretch. On the dial that is the first three rings, the next thirteen, and the last three or so. For a circuit with a chime at every change, run the 40/20 page for the middle twenty and this dial for the whole.
Meetings fill the slot they are given, and a visible thirty-minute dial on the shared screen changes how a room talks. Start it when the meeting starts, not when the last person arrives, and let the chime end it. People make their point sooner when they can see the face emptying, and nobody has to be the one who says time is up.
Half an hour is the practice session most teachers ask for. Split it on the dial: the first five rings for warm-ups and scales, the middle ten for the hard passage, the last five for playing something through for pleasure. The chime ends the session cleanly, which matters more for children than for the piece.
Thirty minutes with a book is the reading page, this same length with a few notes on making the half hour stick. Either page works; the rings are silent and the chime is the first sound they make.
| Split | Switch at rings |
|---|---|
| Two fifteens | 10 |
| Three tens | 7 and 13 (roughly) |
| Six fives | every third ring and a bit |
A single pomodoro is 25 minutes; brownies and chicken thighs want 35. The card carries a thirty-minute video, and the full list is on the timers page.
1.5 minutes. The dial always has 20 rings, and this timer runs 30 minutes.
Yes. The nearest pages are the 25 minute timer and the 45 minute 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.