Online Stopwatch
A precise online stopwatch with laps, milliseconds and full-screen mode — free and works offline.
100% free
No sign-up
Private · runs in your browser
How to use the free online online stopwatch
- Press Start to begin.
- Use Lap to record splits.
- Press Stop and read the result.
- Reset anytime.
About this tool
A precise stopwatch with start, pause, reset, lap times and milliseconds display. Track workouts, cooking, exams or productivity sessions with clean lap recording and total time. Works offline, respects your privacy, and keeps counting even if you switch tabs.
Key features
- Millisecond precision
- Lap times
- Fullscreen mode
- Works offline
Privacy first: every calculation and generation runs 100% locally in your web browser using the Web Crypto API. Your input never touches a server — nothing is stored, logged or sold.
Frequently asked questions
It uses the browser's high-resolution clock (performance.now) with millisecond precision, consistent with system time.
Yes — press Lap to record split times, which are listed below with cumulative and lap durations.
Timing is based on real elapsed time (performance.now), so it stays accurate even if you switch tabs or minimize.
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