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JavaScript Minifier

Minify JavaScript code by removing whitespace and comments. Reduce file size for faster loading.

How to Use JavaScript Minifier

  1. Paste your JavaScript code into the input field
  2. Click the "Minify JavaScript" button
  3. View the size reduction statistics
  4. Copy the minified code or download as a file

What Does JavaScript Minification Do?

  • Removes Comments - Strips out single-line and multi-line comments used during development
  • Eliminates Whitespace - Removes unnecessary spaces, tabs, and newlines
  • Optimizes Operators - Removes spaces around operators and punctuation
  • Reduces File Size - Significantly smaller files for faster loading

Benefits of JavaScript Minification

  • Faster Page Load - Smaller JS files download faster, especially on mobile networks
  • Reduced Parse Time - Less code means the browser parses scripts faster
  • Lower Bandwidth Costs - Reduced server bandwidth and CDN costs
  • Better User Experience - Faster interactivity leads to happier users
  • Improved Core Web Vitals - Better Time to Interactive (TTI) and Total Blocking Time (TBT)

JavaScript Minification Best Practices

  • Always keep unminified source files in version control
  • Use source maps for debugging minified code in production
  • Consider using advanced minifiers like Terser for production builds
  • Bundle multiple files before minifying to reduce HTTP requests
  • Enable Gzip or Brotli compression for additional size reduction

When to Use This Tool

  • Quick minification without setting up build tools
  • Testing minification on small code snippets
  • Learning how minification affects your code
  • Preparing inline scripts for HTML pages

Note on Advanced Minification

This tool provides basic minification by removing comments and whitespace. For production applications, consider using advanced minifiers like Terser, UglifyJS, or esbuild, which can also rename variables, remove dead code, and perform other optimizations for even smaller file sizes.

Privacy & Security

All processing happens entirely in your browser. Your JavaScript code is never sent to any server, ensuring complete privacy and security of your source code.