JavaScript Formatter

Format, beautify, and minify your JavaScript code online. Clean up messy JS, adjust indentation, sort object keys, and preview results instantly. All processing is done locally in your browser.

Remove all unnecessary whitespace
Sort top-level object keys alphabetically (for plain objects only)
History
No history yet.

Fast & Efficient

Instant formatting and minification with real-time preview. Supports large and complex JavaScript files.

Customizable

Choose indentation width and character, sort object keys, and minify output to suit your needs.

Live Preview

Instantly preview the formatted JavaScript output as it would appear in a code block.

Export & Share

Copy or export your formatted JavaScript for use in projects, documentation, or sharing with others.

Secure & Private

All processing happens locally in your browser. Your code never leaves your device.

Developer Friendly

Syntax highlighting, error detection, and advanced formatting options to save development time.

Common Use Cases

Web Development

  • Clean up and beautify messy JavaScript code
  • Minify JavaScript for production deployment
  • Preview JavaScript output before publishing

Collaboration & Documentation

  • Share formatted JavaScript with teammates
  • Export JavaScript for documentation or code review
  • Ensure consistent formatting across projects

Frequently Asked Questions

Is this tool free to use?

Yes, this tool is completely free to use with no limitations or registration required.

How is my data protected?

All formatting and previewing is done locally in your browser. Your code never leaves your device or is sent to any server.

Can I minify or beautify JavaScript?

Yes, you can choose to minify for compact output or beautify for readability, with full control over indentation and key sorting.

Can I export the formatted JavaScript?

Yes, you can copy or export the formatted JavaScript as a .js file for use in your projects or sharing with others.