Stopwatch & Countdown Timer
Accurate web stopwatch with lap recording and countdown timer featuring synthesized Web Audio chime alerts.
Your inputs are calculated locally in your browser. No personal data is sent across the network.
🔊 Alarm Sound:
Total: 05:0005:00
Quick Add:
⚙️ Custom Timer Configuration
Preset Timers by Category
How to use this tool
1Step 1
Switch between Stopwatch and Countdown Timer tabs.
2Step 2
Start, pause, and record laps, or pick a preset timer.
Frequently asked questions
Does the timer sound require internet?
No, the audio chime is synthesized directly in your browser using the Web Audio API.