Digital online stopwatch featuring high-resolution millisecond precision powered by performance.now() to eliminate timer drift. Tracks lap splits, identifies fastest and slowest laps, supports keyboard controls, and exports lap records to CSV.

Unlike traditional web tools that send your personal data, uploaded photos, or sensitive text to remote cloud servers, our Online Stopwatch operates strictly inside your client browser sandbox. This guarantees high processing speeds without network throttling, and ensures your data privacy is completely preserved.