Online Stopwatch
Last updated: June 1, 2026Start, stop and lap — in your browser.
Online Stopwatch is a free online tool to start, stop and lap — in your browser. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Online Stopwatch
The Online Stopwatch times anything to the hundredth of a second, with start, pause, lap and reset — no app to install. It runs entirely in your browser and keeps counting accurately even if the tab is busy. Free, no sign-up.
- 1Press Start to begin timing.
- 2Tap Lap to record split times.
- 3Pause or Reset whenever you need.
Lap times
Record splits without stopping the clock.
Accurate
Times to 1/100th of a second using your device clock.
Free & instant
No app, no sign-up — just open and start.
Online Stopwatch — frequently asked questions
Does the stopwatch keep running if I switch tabs?
Yes — it tracks real elapsed time from your device clock, so it stays accurate even if the tab is in the background.
Can I record lap times?
Yes, tap Lap while running to capture as many splits as you like.
Is it free?
Yes, completely free with no sign-up.
Share this tool
Send it to someone who needs it or save the link for later.