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Accurate online stopwatch with laps, keyboard shortcuts, and fastest/slowest lap analysis.
About this tool
Accurate online stopwatch with laps, keyboard shortcuts, and fastest/slowest lap analysis.
Online Stopwatch is a free utility tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Online Stopwatch on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
A focused workspace for one-off content, data, or planning jobs — open it, use it, done.
Start with a rough input and iterate until the result matches exactly what you need.
Copy or download the output for your project, document, or daily workflow.
Yes — Online Stopwatch is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Online Stopwatch runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Accurate online stopwatch with laps, keyboard shortcuts, and fastest/slowest lap analysis. It's built for quick, everyday utility tasks with results you can copy or download straight away.
Yes — Online Stopwatch works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.