DeveloperRuns locally · No upload

JavaScript Minifier

Compress JavaScript in the Web Formatter workbench — shows byte savings and shares state with HTML, CSS, and XML tabs.

Private by design

Everything runs in your browser. Your input is never uploaded, stored, or logged on our servers.

Works offline after load

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Frequently asked questions

Is this safe for all JavaScript?+

It is a basic whitespace and comment stripper — always test minified code before deploying to production.

Is this tool free?+

Yes. Every Utiliio utility is free with no sign-up, usage limits, or paywalls.

Do you store my data?+

No. Processing happens entirely in your browser. Your input never leaves your device.

Can I use this tool offline?+

Yes. Once the page loads, most tools continue working without an internet connection.