Lap-perfect timing.
Stopwatch is a free online stopwatch with millisecond precision: start, pause, and tap Lap to record splits with deltas against your previous lap. Timing runs on a wall clock, so it never drifts — even in a background tab.
00:00.000total
0laps
–fastest lap
–slowest lap
ready
00:00.000
Space start / pause · L lap · R reset
No laps yet — press L while running
| # | Lap | Total | Δ prev |
|---|
Elapsed time is derived from performance.now() on every animation frame — the display refreshes smoothly, but the time itself comes from the system clock, so backgrounding the tab never loses a millisecond. Laps live in this session only.
Built by Shipwright Studio.