What this stopwatch does

A browser-based stopwatch with a big seven-segment LED readout, an analog clock face, laps + splits, keyboard shortcuts, and fullscreen mode. Hit Add lane and it turns into a multi-stopwatch race timer — independent lanes, live ranking, and CSV export of every split.

Single-lane mode

• LED + analog views — flip between digital, analog, or both side-by-side
• Laps / splits with hundredths-of-a-second precision
• Fullscreen for big-screen workouts, classroom drills, or game shows
• Keyboard: Space start/pause, L lap, R reset, F fullscreen, V cycle view
• Survives reloads — labels and elapsed time persist in localStorage

Multi-lane (race timer) mode

Click Add lane to run any number of stopwatches at once. The same page handles:

• Independent lanes — start / pause / lap / reset each one individually
• Start all / Pause all so every lane begins at the gun together
• Label each lane (Alice, Lane 1, Pot A…) — labels show up in the CSV export
• Live ranking sorted fastest first with gold / silver / bronze highlight
• CSV export dumps every watch's elapsed time + every lap split

Common use cases

• Sport drills, classroom races, swim heats, debate rebuttals, cooking timers, exercise sets
• Time-and-motion studies (count cycle times across N stations)
• Game-show host's two-minute warning, or kids' chore challenges

Why this beats N tabs of a single-stopwatch site

Browser tab timers drift apart when the tab isn't focused, and merging the times afterwards is a chore. This page keeps every watch on the same event loop with the same persisted state, so the gap between two laps stays accurate to a hundredth of a second.