JavaScript Minifier & Beautifier

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Minified Output0 bytes / 0 lines
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What This Tool Does

JavaScript Minifier & Beautifier is built for deterministic developer and agent workflows.

Minify or beautify JavaScript code with compression ratio stats.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

Best Path For Builders

Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/js-minifier/

For automation planning, fetch the canonical contract at /api/tool/js-minifier.json.

How to Use JavaScript Minifier & Beautifier

  1. 1

    Paste JavaScript code

    Copy your JavaScript (ES5, ES6, or modern) into the editor. Supports single or multiple files.

  2. 2

    Choose minify or beautify

    Select 'Minify' to remove whitespace, comments, and compress variable names, or 'Beautify' to format unreadable code with proper indentation.

  3. 3

    Configure options

    For minify: choose mangle variable names, remove console statements, or keep specific global names. For beautify: set indent size and formatting style.

  4. 4

    Preserve safe code

    The minifier respects string literals, regex patterns, and template literals—no accidental breaking of embedded URLs or regex.

  5. 5

    Compare sizes

    View before/after byte count and compression percentage. Copy the minified code or download for production builds.

Frequently Asked Questions

What is JavaScript Minifier & Beautifier?
JavaScript Minifier & Beautifier compresses JavaScript code by removing whitespace and comments, or beautifies minified code into readable format. It shows compression ratio stats so you can see how much space you saved.
How do I use JavaScript Minifier & Beautifier?
Paste your JavaScript code into the editor and click Minify to compress it or Beautify to format it. The tool shows the original and processed sizes along with the compression ratio.
Is JavaScript Minifier & Beautifier free?
Yes. This tool is free to use with immediate access—no account required.
Does JavaScript Minifier & Beautifier store or send my data?
No. All processing happens entirely in your browser. Your JavaScript code never leaves your device — nothing is sent to any server.
How much can JavaScript minification reduce file size?
Minification typically reduces JavaScript file size by 30-60% by removing whitespace, comments, and unnecessary characters. For even greater savings, use a bundler with tree-shaking and gzip compression in production.