Is the JS minifier free?

Yes, completely free with no signup required.

All minification runs in your browser using Terser. Your file never leaves your browser.

What is JavaScript minification?

JS minification removes whitespace, comments, and renames local variables to shorter names. This reduces file size and speeds up page load times.

Does minification break my code?

Terser is a production-grade minifier trusted by Webpack and Vite. It is safe for standard JavaScript. Code relying on function.name or argument names may behave differently.

What compression ratio can I expect?

Typical unminified JS is compressed by 30–60%. Code with lots of comments and long variable names sees the highest savings.

JavaScript Minifier & Beautifier Online Free

Minify JavaScript using Terser or beautify with js-beautify. Shows compression ratio. Browser-based.

🔒 Your file never leaves your browser. All processing runs locally using Terser.

Input JavaScript

Output

How to Minify JavaScript Online

1
Paste your JavaScript
Paste your JavaScript code in the input box.
2
Click Minify or Beautify
Minify compresses using Terser. Beautify formats the code with consistent indentation.
3
Copy the result
Click Copy to copy the processed code to your clipboard.

Frequently Asked Questions

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