Online Stopwatch
Track time precisely with our free online stopwatch. Log laps, work offline, and sync seamlessly across all your devices. Install for offline use.
CountdownClock.io's free online stopwatch lets you start, pause, and record laps right from your browser. It works offline and on mobile, making it perfect for workouts, study sessions, or time tracking.
How to Use the Stopwatch
Click Start to begin timing. Use Lap to record split times without stopping the clock. Press Pause to temporarily stop, then Resume to continue. Hit Reset to clear everything and start fresh.
Your stopwatch state is automatically saved, so you can close the tab or navigate away and return to find your timer exactly where you left it.
Why Use an Online Stopwatch?
An online stopwatch is accessible from any device with a browser — no app download required. It's perfect for timing workouts, tracking study intervals, measuring cooking times, or recording lap times during practice sessions.
With offline support and automatic state persistence, you won't lose your timing data even if you accidentally close the browser or lose internet connection.
Stopwatch vs. Countdown Timer
A stopwatch counts up from zero, measuring elapsed time. It's ideal when you need to track how long something takes. A countdown timer counts down from a set time to zero, perfect for deadlines or timed events.
Use our stopwatch for open-ended timing and our countdown clock when you need to hit a specific target time.
Related Tools
- Countdown Clock – Build a countdown clock for your event
- Days between Dates Calculator – Add, subtract, and calculate time durations
“Simple, clean, and works perfectly for my morning run!”