JavaScript Formatter/Minifier
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Last updated: 2026 · Free online tool
What is JavaScript Formatter/Minifier?
Free online tool that formats JavaScript code with the Prettier engine for consistent indentation and style, or minifies it by stripping whitespace and comments to reduce file size
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.