browserutils

JavaScript Formatter

Beautify and format JavaScript code

JavaScript Formatter is a free online tool from BrowserUtils that beautify and format javascript code. It runs entirely in your browser — your data never leaves your device. No account required.

How to use JavaScript Formatter

  1. 1 Paste or type your input into the editor above.
  2. 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
  3. 3 Copy the result with one click or continue editing your input.

About JavaScript Formatter

Free online JavaScript formatter and beautifier. Format minified or messy JS code with proper indentation. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.

JavaScript Formatter specs

Runtime
100% client-side (browser)
Cost
Free — no account, no rate limits, no usage caps
Browser support
Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
Part of
299 developer tools on BrowserUtils (100% client-side)

Questions

How do I format minified JavaScript?
Paste your minified or obfuscated JavaScript into the input field. The formatter will reconstruct proper indentation, line breaks, and spacing to make the code readable and debuggable.
Does the JavaScript formatter support ES6 and modern syntax?
Yes, the formatter handles modern JavaScript features including arrow functions, template literals, destructuring, async/await, and optional chaining syntax.
Is the JavaScript formatter safe for private code?
Yes, formatting runs entirely in your browser. Your JavaScript never leaves your device, making it safe for proprietary or sensitive code.
Can I format JSX with the JavaScript formatter?
Basic JSX will be formatted since it shares JavaScript syntax structure, but for best results with React components, use a dedicated JSX-aware formatter.
Does the JavaScript formatter fix syntax errors?
No, the formatter restructures whitespace and indentation but does not correct syntax errors. If your code has missing brackets or invalid syntax, you will see an error message.
Embed this tool

Copy this code to embed the tool on your website. Adjust the height to fit your layout.

<iframe src="https://www.browserutils.dev/embed/javascript-formatter" width="100%" height="500" frameborder="0" title="JavaScript Formatter"></iframe>

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