JavaScript Formatter/Minifier

JavaScript formatter powered by the Prettier engine for consistent indentation and style, plus a minifier that strips whitespace and comments. Free and instant in your browser, no upload, no install.

Input JavaScript

Result

Click the run button.

Embed

<iframe src="https://devtools.patrache.studio/en/regex-code/js-formatter/?embed=1" width="100%" height="620"
  style="border:1px solid #e5e7eb;border-radius:12px" loading="lazy"
  title="JavaScript Formatter/Minifier — Patrache Studio DevTools"></iframe>
<p><a href="https://devtools.patrache.studio/en/regex-code/js-formatter/">JavaScript Formatter/Minifier</a> by
   <a href="https://patrache.studio/">Patrache Studio</a></p>

Last updated: 2026 · Free online tool

What is JavaScript Formatter/Minifier?

JavaScript formatter powered by the Prettier engine for consistent indentation and style, plus a minifier that strips whitespace and comments. Free and instant in your browser, no upload, no install.

How to Use

1
Enter JavaScript— Paste your JavaScript code on the left.
2
Select mode— Choose format or minify mode.
3
Execute— Click the execute button and the result will be displayed.

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Frequently Asked Questions

Currently only JavaScript (ES2024) is supported. TypeScript support is planned for a future update.

Indentation size can be selected, and singleQuote and trailingComma are applied by default.

Yes, modern syntax including import/export, dynamic import, and top-level await are supported.

No. Prettier standalone runs directly in the browser.

Yes, the Babel parser automatically handles JSX syntax.

JavaScript Formatter/Minifier

What is JavaScript Formatter/Minifier?

How to Use

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Frequently Asked Questions

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