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Benchmark Builder

Compare the execution time of JavaScript snippets directly in your browser.

Benchmarks run on the main thread. The page may freeze briefly during high-iteration runs.
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  • 100% free — no account needed
  • Runs in your browser
  • Nothing is uploaded

Frequently asked questions

Is Benchmark Builder really free?

Yes. Benchmark Builder is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.

Does Benchmark Builder upload my data?

No. Benchmark Builder runs entirely inside your browser, so anything you type, paste, or open stays on your own device.

Do I need to sign up or install anything?

Neither. There is no account and nothing to download — open the page and Benchmark Builder is ready to use on desktop or mobile.

Does Benchmark Builder work offline?

Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.

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