Stopwatch
Simple stopwatch with start, pause, and reset — centisecond precision in your browser.
Processing: runs in your browser, nothing uploaded
About Stopwatch
When something on your device misbehaves, a quick in-browser check saves guesswork. Use Stopwatch when you need online stopwatch: simple stopwatch with start, pause, and reset — centisecond precision in your browser.
What Stopwatch checks
Simple stopwatch with start, pause, and reset — centisecond precision in your browser. Results describe this browser and device only — useful for isolating mute switches, permissions, and display quirks.
If the test fails
Check OS settings, tab mute, extensions, and whether another app has exclusive device access. Retry after a click if the browser blocked autoplay or permission prompts.
Where your data goes
Stopwatch runs in your browser for this job. Your time is not uploaded to FileToolsHub servers for the conversion itself, which matters when you are dealing with private notes, drafts, or local files.
How to use
- 1
Press Start.
- 2
Pause anytime.
- 3
Reset to zero.
Privacy
Runs entirely in your browser — your time is not uploaded.
Frequently asked questions
Background tabs?
Browsers may throttle timers in background tabs — keep the tab open for best accuracy.
Is Stopwatch free?
Yes. Stopwatch is free for everyday use with no account required, and it runs in your browser.
Does Stopwatch upload my data?
No. Stopwatch processes your time locally in this tab.
What input does Stopwatch expect?
Provide a time as shown on the page.
Background tabs?
Browsers may throttle timers in background tabs — keep the tab open for best accuracy.
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