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Countdown Timer
Pick a target, start the countdown, and pause or resume it any time. The remaining time is worked out from a stored timestamp on every tick.
Remaining time is computed from a stored timestamp on every tick, not by subtracting one each second.
Questions
Does the countdown stay accurate if I leave the tab open?
Yes. It stores a target timestamp and subtracts the current time on every tick, so returning to the tab corrects the display.
Can I share this countdown?
Yes. Use the copy shareable link button to get a link with the target time encoded in it.