About Online Stopwatch & Countdown Timer Free — Accurate Lap Timer
Time workout intervals, monitor study sessions, time presentations, and measure speedruns with an accurate, distraction-free stopwatch and countdown timer.
Key Features & Capabilities
- Millisecond precision stopwatch with split lap recording
- Customizable countdown timer with sound alerts
- Fullscreen display mode for presentations and workouts
- Spacebar keyboard shortcut controls (Start, Pause, Reset, Lap)
- 100% private in-browser timing
How to Use the Online Stopwatch and Timer
Step 1: Select Stopwatch or Timer
Switch between the lap stopwatch or countdown timer.
Step 2: Start Timing
Click Start or press the Spacebar to begin timing.
Step 3: Record Laps or Wait for Alarm
Record lap splits or let the timer alert you when time expires.
Frequently Asked Questions
Does the timer keep running if I switch tabs?
Yes! High-precision timestamps ensure accurate timing even if your browser tab is in the background.
Can I use keyboard shortcuts?
Yes, press Spacebar to start/stop and press 'L' to record lap splits.
Related Utility Tools
Why Zaeyon?
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Powered by WebAssembly — the same low-level technology used in native apps — so processing is fast even for large files.
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