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JS Minifier

Minify JavaScript code online. Remove comments and whitespace for production.

How to Use JS Minifier

1

Paste your JavaScript code

Copy your JS code from a script file, code editor, or browser DevTools console and paste it into the minifier input area.

2

Configure minification settings

The minifier removes whitespace, comments, and line breaks by default. All code logic and functionality is preserved during the compression process.

3

Minify the JavaScript

Click Minify to compress the code. The tool shows the minified output along with the original and compressed file sizes for comparison.

4

Use in production

Copy the minified JavaScript and include it in your production build. Replace your development scripts with the compressed versions for faster page loads.

About JS Minifier

JavaScript minifier online — compress JS code by removing whitespace, comments, and unnecessary characters for production-optimized scripts. This free JavaScript minification tool reduces file size by 30-60% while maintaining identical code functionality. Essential for improving page speed, reducing server bandwidth, and boosting Google PageSpeed Insights scores. Supports modern ES6+ syntax. All processing runs in your browser for complete code privacy.

Key Features

  • Minify JavaScript by removing whitespace, comments, and line breaks
  • Reduce JS file size by 30-60% for faster page loads and lower bandwidth
  • Preserve all code functionality and execution behavior during compression
  • Handle ES6+ syntax including arrow functions, template literals, and modules
  • Process multiple JavaScript files or code snippets efficiently
  • One-click copy of minified output ready for production deployment

Frequently Asked Questions

How to minify JavaScript online for free?▾
Paste your JavaScript code into the editor and click Minify. The tool strips whitespace, comments, and unnecessary characters instantly. Copy the compressed output for your production build. No signup required.
How to compress JavaScript without breaking functionality?▾
The minifier removes only non-functional characters: whitespace, comments, and line breaks. Variable names, logic, and execution behavior remain completely unchanged.
How to reduce JavaScript file size for faster loading?▾
JS minification typically achieves 30-60% size reduction. For files with extensive comments and formatting, savings can be even higher. Combine with gzip compression for maximum performance gains.
How to minify ES6 JavaScript with arrow functions and modules?▾
The minifier fully supports modern ES6+ syntax including arrow functions, template literals, destructuring, async/await, and import/export statements.
How to tell the difference between minification and obfuscation?▾
Minification removes whitespace to reduce size while keeping code readable. Obfuscation renames variables and restructures code to prevent reverse-engineering. This tool performs minification only.
How to improve Google PageSpeed score with JS minification?▾
Minified JS files load faster, reducing Total Blocking Time (TBT) and Time to Interactive (TTI). Google PageSpeed Insights specifically flags unminified JavaScript as a performance issue.
How to undo JavaScript minification?▾
Use a JavaScript formatter or beautifier to add indentation and line breaks back to minified code. Note that comments removed during minification cannot be recovered.