JavaScript Minifier
Remove comments and collapse whitespace to compress your JS
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Note: This is a structural minifier that preserves string contents. For production, pair with a build tool like Vite or Webpack.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is JavaScript Minifier really free?
Yes. JavaScript Minifier is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does JavaScript Minifier upload my data?
No. JavaScript Minifier 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 JavaScript Minifier is ready to use on desktop or mobile.
Does JavaScript Minifier 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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