How to use: Timer
Set a duration or choose an end date and time. Start the countdown, pause a duration timer, or stop a timer with an end time. Use the presets for common tasks and test the sound before you begin.
Date calculation
New events can follow the device time zone. Uncheck that option to fix a zone, and search by city or IANA name. Shared links pin the zone at creation. A running countdown keeps its target when the device zone changes. Daylight saving follows the selected zone.
Sharing
Choose a countdown type, name, target and time zone, then create a link. Each recipient uses the same fixed target. A later visit does not restart it. Editing requires a new link; there is no host control or live group pause.
Browser alerts need an open tab and device support. Sleep, muted audio or a closed browser can prevent an alert. Calendar events have no alarm. This tool uses your device clock; clock errors can cause differences between recipients.
Storage preferences
Allow saving to keep presets, events, language and settings in this browser. Declining leaves these in memory for the visit. Active clocks use tab session storage for refresh recovery. Clearing browser data removes saved items; there is no account or cross-device backup.