A stopwatch with laps that does not drift in a background tab.
Ready
00:00.00
Nothing to configure. Start, stop and resume as often as you like; the elapsed total is measured against the clock, so stopping and resuming does not lose time.
Clocks here run against real time, so a background tab does not make them drift. Browsers do hold audio in inactive tabs, so a sound may arrive late even when the time is right.
Stopwatch on RunTheTests — free browser-based time tools, no sign-up.