Minify JavaScript
Paste your JavaScript code to strip comments, collapse whitespace, and reduce file size for faster page loads and better Core Web Vitals.
What is Minify JavaScript?
JavaScript minification is the process of removing all unnecessary characters from your JS code — including whitespace, line breaks, block and inline comments — without altering its functionality. Minified JavaScript loads faster, reduces bandwidth usage, and improves your website's Core Web Vitals scores.
How to Fix It
Use this tool to minify your JavaScript and follow best practices for file size reduction.
Best Practices
- Always keep an unminified source version for development and debugging.
- Automate minification using build tools like Webpack, Vite, or esbuild.
- Combine minification with tree-shaking to eliminate unused code paths.
- Use source maps in development so minified code remains debuggable.
- Enable gzip or brotli compression on your server alongside minification.
- Audit third-party scripts — they are often the largest unminified bundles.