ProfitTool
Fun & Utility

Online Stopwatch

A precise stopwatch with hundredths of a second — start, pause and reset with a click.

No ProfitTool signupFree to use

Data handling: Processing: this tool runs in your browser and does not send entered data to a tool-service endpoint. Site analytics, advertising, or embedded resources may still make separate requests. See the Privacy Policy for site-level details.

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About Online Stopwatch

A precise stopwatch with hundredths of a second — start, pause and reset with a click. This utility provides an instant, focused workspace designed around that single purpose. Using it is a three-step job: 1) Open Online Stopwatch and review the inputs, units, and data-handling notice shown on its page, 2) Enter the information requested by this tool and adjust only the options that apply to your task, 3) Review the result and use the available copy, download, or reset controls. Processing depends on the specific operation. Any external lookup or service should be identified near the tool controls.

Online Stopwatch is a free, browser-based stopwatch from ProfitTool. A precise stopwatch with hundredths of a second — start, pause and reset with a click. Review any usage notes shown on this page before relying on its availability. Review the tool's data-handling notice before entering sensitive information; some features store settings locally or contact external services.

Pairs naturally with the 1 Second CPS Test — Countdown Timer handles the follow-up case.

How to use Online Stopwatch

  1. 1Open Online Stopwatch and review the inputs, units, and data-handling notice shown on its page.
  2. 2Enter the information requested by this tool and adjust only the options that apply to your task.
  3. 3Review the result and use the available copy, download, or reset controls. Processing and storage behavior vary by tool.

If you came here from the 10 Second CPS Test, 1 Second CPS Test covers the other half of the workflow.

Popular Use Cases

  • Case 1
    Roll dice, flip coins and pick random winners for giveaways.
  • Case 2
    Generate QR codes for menus, Wi-Fi handoffs and printed materials.
  • Case 3
    Time short sessions — pomodoros, workouts, cooking and study blocks.
  • Case 4
    Play with fancy text, palindromes and word-play generators.

Pro Tips & Best Practices

  • Everything is free and unlimited — refresh as many times as you like.
  • Add the page to your home screen for a one-tap widget on mobile.
  • Bookmark the tool with your preferred settings pre-filled in the URL.

Data Handling

Data handling depends on this tool's implementation. Read the Data handling notice above the tool before entering sensitive information. Some features run locally; others contact named providers or ProfitTool services. Site analytics, advertising, and embedded resources may also make separate requests.

Frequently Asked Questions

Is the randomness in Online Stopwatch genuinely fair?›

Randomness and fairness depend on the implementation. Review the tool's description before using it for a consequential draw or competition.

Is Online Stopwatch free to use?›

Yes — Online Stopwatch is completely free with no signup, watermark, trial or hidden paywall, however often you use it.

Can I use Online Stopwatch for a giveaway or classroom activity?›

Yes, and it's free for commercial use. For prize draws, record your screen so participants can see the result was not re-rolled.

Does Online Stopwatch work on mobile phones and tablets?›

Yes. The layout is mobile-first and tested on iOS Safari, Android Chrome and every current desktop browser, with tap targets sized for thumbs.

Does this stopwatch work offline?›

Once the page has loaded, yes — it keeps working in airplane mode and can be added to your phone's home screen like an app.

Is my data safe when I use this stopwatch?›

Data handling varies by tool. Read the notice above the workspace to see whether your input stays in the browser or is sent to a named provider or service. Avoid entering sensitive information unless you understand that tool's handling.

Is there a limit on how many times I can run it?›

Usage availability can depend on the feature and connected services. Contextual advertising may appear on the site.

Why Use Online Stopwatch on ProfitTool?

Online Stopwatch sits inside ProfitTool's Fun & Utility collection — 250+ tools for makers, streamers, teachers and anyone testing a quick idea. Review this tool's inputs and data-handling notice before use.

Online Stopwatch is part of ProfitTool's fun & utility collection for makers, streamers, teachers and anyone testing a quick idea. Review its documented inputs, assumptions, and data handling to decide whether it fits your task.